Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  5b4943cb37d0c5ebc8e9a2010c0be663a9827d8a

Add `make gerrit` to manage code review

This gives command line access to open patchsets to speed up
code review.

Change-Id: I3ddd1c62fd9826fb5b62c23fda6548b2fa66a610