Add .git to FLAGGED_FILE_REGEX

[erosman]

.git also appears regularly enough in addon XPIs

https://github.com/mozilla/addons-linter/blob/fdc4da955f11740b873a8f77cd422c0e8bb8326c/src/const.js#L97

Example: https://addons.mozilla.org/en-US/firefox/addon/noadfocus/

┆Issue is synchronized with this Jira Task

[willdurand]

I think that would make sense, @wagnerand thoughts?

[wagnerand]

Yes! That directory should definitely be removed. It would be cool if we could even raise this before a developer submits it to AMO, but that's a different topic.

[stale[bot]]

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