db: allow replacing files of origin package is same

basically this makes packager's life simpler as there is no need
to list the subpkg names in replaces. this was also very error
prone and tedious job to do properly.

src/database.c

@@ -2294,6 +2294,9 @@ static int apk_db_install_archive_entry(void *_ctx,
 				/* Upgrading package? */
 				if (opkg->name == pkg->name)
 					break;
+				/* Or same source package? */
+				if (opkg->origin == pkg->origin && pkg->origin)
+					break;
 				/* Does the original package replace the new one? */
 				foreach_array_item(dep, opkg->ipkg->replaces) {
 					if (apk_dep_is_materialized(dep, pkg)) {