merge.applyupdates: extend action queues with ones returned from mergestate

These queues will always be empty at the moment -- we're going to fill them up
in upcoming patches.

mercurial/merge.py

@@ -1119,6 +1119,11 b' def applyupdates(repo, actions, wctx, mc'
     updated += msupdated
     merged += msmerged
     removed += msremoved
+
+    extraactions = ms.actions()
+    for a in 'rag':
+        actions[a].extend(extraactions[a])
+
     progress(_updating, None, total=numupdates, unit=_files)
 
     return updated, merged, removed, unresolved