largefiles: preserve the exit status of the rebase command

hgext/largefiles/overrides.py

@@ -743,7 +743,7 b' def overrideclone(orig, ui, source, dest'
 def overriderebase(orig, ui, repo, **opts):
     repo._isrebasing = True
     try:
-        orig(ui, repo, **opts)
+        return orig(ui, repo, **opts)
     finally:
         repo._isrebasing = False