kconfig: mconf: fix HOSTCC call

Commit c0f975a ("kconfig: Support building mconf with vendor
sysroot ncurses") introduces a bug when HOSTCC contains parameters:
the whole command line is treated as the program name (with spaces
in it). Therefore, we have to remove the quotes.

Fixes: c0f975a ("kconfig: Support building mconf with vendor sysroot ncurses")
Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/mconf-cfg.sh

@@ -35,7 +35,7 @@ fi
 
 # As a final fallback before giving up, check if $HOSTCC knows of a default
 # ncurses installation (e.g. from a vendor-specific sysroot).
-if echo '#include <ncurses.h>' | "${HOSTCC}" -E - >/dev/null 2>&1; then
+if echo '#include <ncurses.h>' | ${HOSTCC} -E - >/dev/null 2>&1; then
 	echo cflags=\"-D_GNU_SOURCE\"
 	echo libs=\"-lncurses\"
 	exit 0