Make mediawiki checkout folder 775

Change-Id: Id0b59949463aadff87f7fb3a3cb0dec43519f33c
Don't create lib directory, we don't use it

Change-Id: Icc2b7d9593eb1235e7e5a623f4a53aca339b18fd
Merge changes Icc2b7d95,Id0b59949

* changes:
  Don't create lib directory, we don't use it
  Make mediawiki checkout folder 775