ignore normalization errors for Git repositories

[Jelmer Vernooij]

Traceback (most recent call last):
  File "/usr/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/janitor/debian-janitor/janitor/worker.py", line 920, in <module>
    sys.exit(main())
  File "/home/janitor/debian-janitor/janitor/worker.py", line 887, in main
    resume_subworker_result=resume_subworker_result)
  File "/home/janitor/debian-janitor/janitor/worker.py", line 686, in process_package
    pick_additional_colocated_branches(main_branch))) as ws:
  File "/home/janitor/debian-janitor/silver-platter/silver_platter/proposal.py", line 276, in __enter__
    self.resume_branch or self.main_branch, overwrite=True)
  File "/home/janitor/debian-janitor/breezy/breezy/git/workingtree.py", line 1223, in pull
    show_base=show_base)
  File "/home/janitor/debian-janitor/breezy/breezy/git/workingtree.py", line 1209, in _update_git_tree
    show_base=show_base)
  File "/home/janitor/debian-janitor/breezy/breezy/merge.py", line 1919, in merge_inner
    return merger.do_merge()
  File "/home/janitor/debian-janitor/breezy/breezy/merge.py", line 663, in do_merge
    merge = self._do_merge_to()
  File "/home/janitor/debian-janitor/breezy/breezy/merge.py", line 632, in _do_merge_to
    merge.do_merge()
  File "/home/janitor/debian-janitor/breezy/breezy/merge.py", line 768, in do_merge
    results = self.tt.apply(no_conflicts=True)
  File "/home/janitor/debian-janitor/breezy/breezy/transform.py", line 1789, in apply
    inventory_delta = self._generate_inventory_delta()
  File "/home/janitor/debian-janitor/breezy/breezy/transform.py", line 1860, in _generate_inventory_delta
    parent_file_id, file_id)
  File "/home/janitor/debian-janitor/breezy/breezy/bzr/inventory.py", line 2315, in make_entry
    name = ensure_normalized_name(name)
  File "/home/janitor/debian-janitor/breezy/breezy/bzr/inventory.py", line 2341, in ensure_normalized_name
    raise errors.InvalidNormalization(name)
breezy.errors.InvalidNormalization: Path "éééürtüéŋəü.wav" is not unicode normalized