gcc: lib64 not added to LD_LIBRARY_PATH

[pmenzel]

$ ls -l /pkg/gcc-11.1.0-0/lib{,64}/
/pkg/gcc-11.1.0-0/lib/:
total 0
drwxr-xr-x 2 bin bin 38 Jun 21  2021 bfd-plugins
lrwxrwxrwx 1 bin bin 25 Jun 21  2021 cpp -> /pkg/gcc-11.1.0-0/bin/cpp
drwxr-xr-x 3 bin bin 41 Jun 21  2021 gcc

/pkg/gcc-11.1.0-0/lib64/:
total 281128
drwxr-xr-x 3 bin bin       28 Jun 21  2021 go
-rw-r--r-- 1 bin bin 11744126 Jun 21  2021 libasan.a
-rwxr-xr-x 1 bin bin     1022 Jun 21  2021 libasan.la
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 libasan.so -> libasan.so.6.0.0
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 libasan.so.6 -> libasan.so.6.0.0
-rwxr-xr-x 1 bin bin  7626952 Jun 21  2021 libasan.so.6.0.0
-rw-r--r-- 1 bin bin     6240 Jun 21  2021 libasan_preinit.o
-rw-r--r-- 1 bin bin   386170 Jun 21  2021 libatomic.a
-rwxr-xr-x 1 bin bin      975 Jun 21  2021 libatomic.la
lrwxrwxrwx 1 bin bin       18 Jun 21  2021 libatomic.so -> libatomic.so.1.2.0
lrwxrwxrwx 1 bin bin       18 Jun 21  2021 libatomic.so.1 -> libatomic.so.1.2.0
-rwxr-xr-x 1 bin bin   149624 Jun 21  2021 libatomic.so.1.2.0
-rwxr-xr-x 1 bin bin      984 Jun 21  2021 libcc1.la
lrwxrwxrwx 1 bin bin       15 Jun 21  2021 libcc1.so -> libcc1.so.0.0.0
lrwxrwxrwx 1 bin bin       15 Jun 21  2021 libcc1.so.0 -> libcc1.so.0.0.0
-rwxr-xr-x 1 bin bin   993456 Jun 21  2021 libcc1.so.0.0.0
-rw-r--r-- 1 bin bin      132 Jun 21  2021 libgcc_s.so
-rw-r--r-- 1 bin bin   484848 Jun 21  2021 libgcc_s.so.1
-rw-r--r-- 1 bin bin 13662200 Jun 21  2021 libgfortran.a
-rwxr-xr-x 1 bin bin     1032 Jun 21  2021 libgfortran.la
lrwxrwxrwx 1 bin bin       20 Jun 21  2021 libgfortran.so -> libgfortran.so.5.0.0
lrwxrwxrwx 1 bin bin       20 Jun 21  2021 libgfortran.so.5 -> libgfortran.so.5.0.0
-rwxr-xr-x 1 bin bin  9229920 Jun 21  2021 libgfortran.so.5.0.0
-rw-r--r-- 1 bin bin      269 Jun 21  2021 libgfortran.spec
-rw-r--r-- 1 bin bin 93930496 Jun 21  2021 libgo.a
-rwxr-xr-x 1 bin bin     1045 Jun 21  2021 libgo.la
lrwxrwxrwx 1 bin bin       15 Jun 21  2021 libgo.so -> libgo.so.19.0.0
lrwxrwxrwx 1 bin bin       15 Jun 21  2021 libgo.so.19 -> libgo.so.19.0.0
-rwxr-xr-x 1 bin bin 53222984 Jun 21  2021 libgo.so.19.0.0
-rw-r--r-- 1 bin bin    15334 Jun 21  2021 libgobegin.a
-rw-r--r-- 1 bin bin    20652 Jun 21  2021 libgolibbegin.a
-rw-r--r-- 1 bin bin  1874240 Jun 21  2021 libgomp.a
-rwxr-xr-x 1 bin bin      957 Jun 21  2021 libgomp.la
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 libgomp.so -> libgomp.so.1.0.0
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 libgomp.so.1 -> libgomp.so.1.0.0
-rwxr-xr-x 1 bin bin  1287208 Jun 21  2021 libgomp.so.1.0.0
-rw-r--r-- 1 bin bin      169 Jun 21  2021 libgomp.spec
-rw-r--r-- 1 bin bin  1600078 Jun 21  2021 libitm.a
-rwxr-xr-x 1 bin bin      945 Jun 21  2021 libitm.la
lrwxrwxrwx 1 bin bin       15 Jun 21  2021 libitm.so -> libitm.so.1.0.0
lrwxrwxrwx 1 bin bin       15 Jun 21  2021 libitm.so.1 -> libitm.so.1.0.0
-rwxr-xr-x 1 bin bin  1032328 Jun 21  2021 libitm.so.1.0.0
-rw-r--r-- 1 bin bin      162 Jun 21  2021 libitm.spec
-rw-r--r-- 1 bin bin  4238392 Jun 21  2021 liblsan.a
-rwxr-xr-x 1 bin bin     1022 Jun 21  2021 liblsan.la
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 liblsan.so -> liblsan.so.0.0.0
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 liblsan.so.0 -> liblsan.so.0.0.0
-rwxr-xr-x 1 bin bin  2729800 Jun 21  2021 liblsan.so.0.0.0
-rw-r--r-- 1 bin bin     4320 Jun 21  2021 liblsan_preinit.o
-rw-r--r-- 1 bin bin   504270 Jun 21  2021 libobjc.a
-rwxr-xr-x 1 bin bin      952 Jun 21  2021 libobjc.la
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 libobjc.so -> libobjc.so.4.0.0
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 libobjc.so.4 -> libobjc.so.4.0.0
-rwxr-xr-x 1 bin bin   331328 Jun 21  2021 libobjc.so.4.0.0
-rw-r--r-- 1 bin bin  1614388 Jun 21  2021 libquadmath.a
-rwxr-xr-x 1 bin bin      984 Jun 21  2021 libquadmath.la
lrwxrwxrwx 1 bin bin       20 Jun 21  2021 libquadmath.so -> libquadmath.so.0.0.0
lrwxrwxrwx 1 bin bin       20 Jun 21  2021 libquadmath.so.0 -> libquadmath.so.0.0.0
-rwxr-xr-x 1 bin bin  1022440 Jun 21  2021 libquadmath.so.0.0.0
-rw-r--r-- 1 bin bin      362 Jun 21  2021 libsanitizer.spec
-rw-r--r-- 1 bin bin    76426 Jun 21  2021 libssp.a
-rwxr-xr-x 1 bin bin      945 Jun 21  2021 libssp.la
lrwxrwxrwx 1 bin bin       15 Jun 21  2021 libssp.so -> libssp.so.0.0.0
lrwxrwxrwx 1 bin bin       15 Jun 21  2021 libssp.so.0 -> libssp.so.0.0.0
-rwxr-xr-x 1 bin bin    42848 Jun 21  2021 libssp.so.0.0.0
-rw-r--r-- 1 bin bin     3326 Jun 21  2021 libssp_nonshared.a
-rwxr-xr-x 1 bin bin      927 Jun 21  2021 libssp_nonshared.la
-rw-r--r-- 1 bin bin 29221328 Jun 21  2021 libstdc++.a
-rwxr-xr-x 1 bin bin      972 Jun 21  2021 libstdc++.la
lrwxrwxrwx 1 bin bin       19 Jun 21  2021 libstdc++.so -> libstdc++.so.6.0.29
lrwxrwxrwx 1 bin bin       19 Jun 21  2021 libstdc++.so.6 -> libstdc++.so.6.0.29
-rwxr-xr-x 1 bin bin 18112192 Jun 21  2021 libstdc++.so.6.0.29
-rw-r--r-- 1 bin bin  6093942 Jun 21  2021 libstdc++fs.a
-rwxr-xr-x 1 bin bin      912 Jun 21  2021 libstdc++fs.la
-rw-r--r-- 1 bin bin  1097310 Jun 21  2021 libsupc++.a
-rwxr-xr-x 1 bin bin      906 Jun 21  2021 libsupc++.la
-rw-r--r-- 1 bin bin 11446492 Jun 21  2021 libtsan.a
-rwxr-xr-x 1 bin bin     1022 Jun 21  2021 libtsan.la
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 libtsan.so -> libtsan.so.0.0.0
lrwxrwxrwx 1 bin bin       16 Jun 21  2021 libtsan.so.0 -> libtsan.so.0.0.0
-rwxr-xr-x 1 bin bin  7343248 Jun 21  2021 libtsan.so.0.0.0
-rw-r--r-- 1 bin bin     3552 Jun 21  2021 libtsan_preinit.o
-rw-r--r-- 1 bin bin  3995286 Jun 21  2021 libubsan.a
-rwxr-xr-x 1 bin bin     1029 Jun 21  2021 libubsan.la
lrwxrwxrwx 1 bin bin       17 Jun 21  2021 libubsan.so -> libubsan.so.1.0.0
lrwxrwxrwx 1 bin bin       17 Jun 21  2021 libubsan.so.1 -> libubsan.so.1.0.0
-rwxr-xr-x 1 bin bin  2563224 Jun 21  2021 libubsan.so.1.0.0