[hack] Ignore hg.update state-leave events with merge = True for purposes of mergebase changes tracking
[hack] Ignore hg.update state-leave events with merge = True for purposes of mergebase changes tracking

Reviewed By: ljw1004

Differential Revision: D10075309

fbshipit-source-id: 7e396d026c5e06ef1453805af9f2aac1b020e3e1

nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow