Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  af78cf5e05514dcf4a0676ecb5e9bf9f852d780c

Additional Makefile commands

- add `ee-flow-big` and `ee-flow-extra` commands to
  update their respective labs instances.
- add combined make command `update-labs` Run with
  `make -j 3 update-labs`
- add `install-analyze` command downloads hhvm-wrapper.php
  and checks for hhvm existance
- add `analyze` command which utilizes hhvm and hhvm-wrapper
  to perform static analysis.

Change-Id: If0be1bd3da1633af2118168e8e54fb4918232330