abuild: rootbld: improve version compatibility

abuild.in

@@ -1997,6 +1997,13 @@ checksum() {
 	echo "sha512sums=\"$sha512sums\"" >>"$APKBUILD"
 }
 
+rootbld_actions() {
+	local part
+	for part in symlinksrc unpack prepare build rootpkg; do
+		runpart $part
+	done
+}
+
 rootbld() {
 	if apk_up2date && [ -z "$force" ]; then
 		msg "Package is up to date"
@@ -2082,7 +2089,7 @@ rootbld() {
 		--hostname "build-edge-$CARCH" \
 		--chdir "$startdir" \
 		--setenv PATH /bin:/usr/bin:/sbin:/usr/sbin \
-		/usr/bin/abuild $force symlinksrc unpack prepare build rootpkg
+		/usr/bin/abuild $force rootbld_actions
 	update_abuildrepo_index
 	cleanup $CLEANUP
 }