libxbps: move hash funcs from util.c into its own file.

lib/Makefile

@@ -44,7 +44,7 @@ OBJS += package_purge.o package_replaces.o
 OBJS += transaction_dictionary.o transaction_sortdeps.o
 OBJS += download.o fexec.o humanize_number.o plist.o
 OBJS += plist_archive_entry.o plist_find.o plist_match.o plist_remove.o
-OBJS += plist_fetch.o util.o mkpath.o initend.o
+OBJS += plist_fetch.o util.o util_hash.o mkpath.o initend.o
 OBJS += regpkgdb_dictionary.o match.o dewey.o
 OBJS += repository_findpkg.o repository_finddeps.o
 OBJS += repository_pool.o repository_sync_index.o