Change toolchain to glibc.

Change-Id: I1af77372e437fa27d64fc895ef9f1ba4dda59a34
diff --git a/package/mbtk-rootfs/Makefile b/package/mbtk-rootfs/Makefile
index 62b7ada..530b1fa 100755
--- a/package/mbtk-rootfs/Makefile
+++ b/package/mbtk-rootfs/Makefile
@@ -33,6 +33,7 @@
 endef
 
 define Package/$(PKG_NAME)/extra_provides
+	echo "libc.so"; \
     echo "libdnet.so.1"; \
 	echo "cfg80211.ko"; \
 	echo "libhttpclient.so"; \