Ports: Shorten the build message for skipped builds

The new message for skipping builds makes it hard to
distinguish failed builds from builds that were just skipped
so change it back to the old one - but don't actually build
packages twice again.

Ports/build_all.sh

@@ -40,7 +40,7 @@ for file in *; do
                 fi
             done
             if [ $port_built -eq 1 ]; then
-                echo "Already built $port as a dependency."
+                echo "Built $port."
                 popd > /dev/null
                 continue
             fi