toolchain: gcc: enable sanitizers for glibc toolchain

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

toolchain/gcc/final/Makefile

@@ -4,7 +4,6 @@ include ../common.mk
 
 GCC_CONFIGURE += \
 	--with-headers=$(TOOLCHAIN_DIR)/include \
-	--disable-libsanitizer \
 	--enable-languages=$(TARGET_LANGUAGES) \
 	--enable-shared \
 	--enable-threads \
@@ -12,6 +11,10 @@ GCC_CONFIGURE += \
 	--enable-lto \
 	--with-libelf=$(TOPDIR)/staging_dir/host
 
+ifndef CONFIG_USE_GLIBC
+  GCC_CONFIGURE += --disable-libsanitizer
+endif
+
 ifdef CONFIG_USE_MUSL
   GCC_MAKE += gcc_cv_libc_provides_ssp=yes
 endif