[buildroot] add config.rpath and link it in autotools.mk if missing, some packages might need it, especially users of lib-link.m4 or iconv.m4

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25753 3c298f89-4303-0410-b956-a3cf2f4a3e73

include/autotools.mk

@@ -41,6 +41,8 @@ define autoreconf
 					-B $(STAGING_DIR_HOST)/share/aclocal \
 					$(patsubst %,-I %,$(5)) \
 					$(patsubst %,-I %,$(4)) $(4) || true; \
+				[ -e $(p)/config.rpath ] || \
+						ln -s $(SCRIPT_DIR)/config.rpath $(p)/config.rpath;
 			fi; \
 		) \
 	);