abuild: fix for detecting self-provided dependencies

abuild.in

@@ -403,8 +403,8 @@ trace_apk_deps() {
 		# first check if its provide by same apkbuild
 		for j in "$dir"/../*/.provides-so; do
 			grep -w "$i" "$j" >/dev/null || continue
+			found=${found%/.*}
 			found=${j##*/}
-			found=${found%/*}
 			break
 		done
 		# check apk db if not provided by a subpackage