[py_utils] Log and skip through atexit_with_log exceptions
[py_utils] Log and skip through atexit_with_log exceptions

Code running during atexit should be considered running on a best-effort
basis, so it's ok to skip through any exceptions (while still logging
them).

Bug: chromium:789119
Change-Id: I1451ef7f1e5b2d4e79bef3710499d1b6ada19f08
Reviewed-on: https://chromium-review.googlesource.com/793049
Reviewed-by: Ned Nguyen <8e49e083cfcfb68517585b2e78d68c2fd2b70562@google.com>
Reviewed-by: John Budorick <17d38a2d68c6a07a3ab0ce4a2873c5acefbd3dbb@chromium.org>
Commit-Queue: Juan Antonio Navarro Pérez <1649bb5e6b9eafe026580e338065dc64ba6b80b2@chromium.org>

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