[package] pjsip: fix linking failure w/ ARM eabi

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25450 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/pjsip/Makefile

@@ -79,7 +79,7 @@ endef
 
 define Build/Compile
 	CFLAGS="$(EXTRA_CFLAGS) $(TARGET_CPPFLAGS) $(EXTRA_CPPFLAGS)" \
-	LDFLAGS="$(TARGET_LDFLAGS) $(EXTRA_LDFLAGS)" \
+	LDFLAGS="$(TARGET_LDFLAGS) $(EXTRA_LDFLAGS) $(LIBGCC_S)" \
 		$(MAKE) -C $(PKG_BUILD_DIR)/$(MAKE_PATH)
 endef