Switch xbps_cmpver() to use NetBSD's dewey code.

lib/Makefile

@@ -42,7 +42,7 @@ OBJS += package_remove.o package_remove_obsoletes.o package_state.o
 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 += cmpver.o download.o fexec.o humanize_number.o plist.o
+OBJS += download.o fexec.o humanize_number.o plist.o
 OBJS += plist_archive_entry.o plist_find.o plist_remove.o
 OBJS += plist_fetch.o util.o mkpath.o initend.o
 OBJS += regpkgdb_dictionary.o match.o dewey.o