external-toolchain: support 64 bits glibc toolchains

On 64 bits glibc toolchains, the dynamic loader is named
ld-linux-x86-64.so and not simply ld-linux.so. So, adjust the
detection of the C library accordingly.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Yann E. MORIN <yann.morin.1998@anciens.enib.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

toolchain/external-toolchain/ext-tool.mk

@@ -157,7 +157,7 @@ check_glibc_feature = \
 #
 check_glibc = \
 	SYSROOT_DIR="$(strip $1)"; \
-	if ! test -f $${SYSROOT_DIR}/lib/ld-linux.so.* -o -f $${SYSROOT_DIR}/lib/ld.so.* ; then \
+	if ! test -f $${SYSROOT_DIR}/lib/ld-linux*.so.* -o -f $${SYSROOT_DIR}/lib/ld.so.* ; then \
 		echo "Incorrect selection of the C library"; \
 		exit -1; \
 	fi; \