largefile: use parentchange during mergerecordupdates

This match what core is doing around recordupdates.

Differential Revision: https://phab.mercurial-scm.org/D11105

hgext/largefiles/overrides.py

@@ -650,7 +650,10 b' def overridecalculateupdates('
 def mergerecordupdates(orig, repo, actions, branchmerge, getfiledata):
     if MERGE_ACTION_LARGEFILE_MARK_REMOVED in actions:
         lfdirstate = lfutil.openlfdirstate(repo.ui, repo)
-        for lfile, args, msg in actions[MERGE_ACTION_LARGEFILE_MARK_REMOVED]:
+        with lfdirstate.parentchange():
+            for lfile, args, msg in actions[
+                MERGE_ACTION_LARGEFILE_MARK_REMOVED
+            ]:
             # this should be executed before 'orig', to execute 'remove'
             # before all other actions
             repo.dirstate.remove(lfile)