scripts/ext-toolchain: add missing libc library specs

Add missing libc library spec that weren't added to the ext-toolchain
script when the library were introduced in the packages libs toolchain
Makefile.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
(cherry picked from commit 8cad52a267)
Link: https://github.com/openwrt/openwrt/pull/15898
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

scripts/ext-toolchain.sh

@@ -40,6 +40,12 @@ LIB_SPECS="
 	ssp:      libssp
 	gfortran: libgfortran
 	gomp:	  libgomp
+	atomic:	  libatomic
+	quadmath: libquadmath
+	asan:	  libasan
+	tasan:	  libtsan
+	lasan:	  liblsan
+	ubasan:	  libubsan
 "
 
 # Binary specs
@@ -384,7 +390,7 @@ print_config() {
 	fi
 
 	local lib
-	for lib in C RT PTHREAD GCC STDCPP SSP GFORTRAN GOMP; do
+	for lib in C RT PTHREAD GCC STDCPP SSP GFORTRAN GOMP ATOMIC QUADMATH ASAN TSAN LSAN UBSAN; do
 		local file
 		local spec=""
 		local llib="$(echo "$lib" | sed -e 's#.*#\L&#')"