Fix malloc threaded tests link on non-Linux

	* malloc/Makefile ($(objpfx)tst-malloc-backtrace,
	$(objpfx)tst-malloc-thread-exit, $(objpfx)tst-malloc-thread-fail): Use
	$(shared-thread-library) instead of hardcoding the path to libpthread.

ChangeLog

@@ -1,3 +1,9 @@
+2016-03-22  Samuel Thibault  <samuel.thibault@ens-lyon.org>
+
+	* malloc/Makefile ($(objpfx)tst-malloc-backtrace,
+	$(objpfx)tst-malloc-thread-exit, $(objpfx)tst-malloc-thread-fail): Use
+	$(shared-thread-library) instead of hardcoding the path to libpthread.
+
 2016-03-22  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/unix/sysv/linux/kernel-features.h

malloc/Makefile

@@ -46,12 +46,9 @@ extra-libs-others = $(extra-libs)
 libmemusage-routines = memusage
 libmemusage-inhibit-o = $(filter-out .os,$(object-suffixes))
 
-$(objpfx)tst-malloc-backtrace: $(common-objpfx)nptl/libpthread.so \
-			       $(common-objpfx)nptl/libpthread_nonshared.a
-$(objpfx)tst-malloc-thread-exit: $(common-objpfx)nptl/libpthread.so \
-			       $(common-objpfx)nptl/libpthread_nonshared.a
-$(objpfx)tst-malloc-thread-fail: $(common-objpfx)nptl/libpthread.so \
-			       $(common-objpfx)nptl/libpthread_nonshared.a
+$(objpfx)tst-malloc-backtrace: $(shared-thread-library)
+$(objpfx)tst-malloc-thread-exit: $(shared-thread-library)
+$(objpfx)tst-malloc-thread-fail: $(shared-thread-library)
 
 # These should be removed by `make clean'.
 extra-objs = mcheck-init.o libmcheck.a