pyoxidized: adapt output of test-bad-extension.t

The file path in the traceback become module name.

Differential Revision: https://phab.mercurial-scm.org/D11295

tests/test-bad-extension.t

@@ -20,7 +20,8 b' ensure that failing ui.atexit handlers r'
   show help for a given topic or a help overview
   error in exit handlers:
   Traceback (most recent call last):
-    File "*/mercurial/dispatch.py", line *, in _runexithandlers (glob)
+    File "*/mercurial/dispatch.py", line *, in _runexithandlers (glob) (no-pyoxidizer !)
+    File "mercurial.dispatch", line *, in _runexithandlers (glob) (pyoxidizer !)
       func(*args, **kwargs)
     File "$TESTTMP/bailatexit.py", line *, in bail (glob)
       raise RuntimeError('ui.atexit handler exception')