libxbps: move match funcs from plist_find.c into its own file.

lib/Makefile

@@ -43,7 +43,7 @@ OBJS += package_unpack.o package_requiredby.o package_register.o
 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_remove.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 += regpkgdb_dictionary.o match.o dewey.o
 OBJS += repository_findpkg.o repository_finddeps.o