Permit makefiles using CLibrary to cross-compile `export` target

This brings it into line with AAsmModule and CModule shared makefiles

GNUmakefiles/CLibrary

@@ -128,7 +128,7 @@ clean::
 	@rm -rf objs
 	@echo ${COMPONENT}: cleaned
 else
-all_libs export_hdrs export_libs links: ${SYMLINK_DEPEND}
+all_libs export export_hdrs export_libs links: ${SYMLINK_DEPEND}
 	$(foreach linksource,${SOURCES_TO_SYMLINK}, \
 		$(shell \
 			linkdest=`echo ${linksource} | sed -e 's,\([^/]*\)/\([^/]*\)$$,\2.\1,' -e 's,^,objs/,'`; \