[PATCH] tests: test-debugcommands.t also matches stack trace on python 2.4

[Simon Heimberg]

# HG changeset patch
# User Simon Heimberg <simohe at besonet.ch>
# Date 1389983438 -3600
# Node ID 87ca4034891b618d92347606c518c521d9d2d2ed
# Parent  48d1047cc38de00db54aff32f4389571a713d16b
tests: test-debugcommands.t also matches stack trace on python 2.4

Some versions of python 2.4 write ? instead of <module>. Ignore this detail by
a glob.
This fixes a failure spotted on buildbot, existing since this test lines were
introduced 47d0843647d1.