Update Flow to 1.24wmf3

Applies bugfixes to the flow links table handling, and sets
up the wgFlowCacheVersion to match mediawiki-config as prep
for the thursday deploy.

Patches applied:
*  Ib806136e599d9fce421c79b78187469a37902d2a
*  I5ffa3e858a1c318566c675cb9da41e108e45dd03
*  I8c0ec0ab9c2dc1e56c9c6d30e4b773a9f52bf653
*  I3c32d79d74a59abfe155174aa314250f1fe2a02a

Change-Id: I09072570c42d6b7ed2297a2e79e0bddc76d3bdaf