Upgrade JGit to v5.8.0.202006091008-r
Upgrade JGit to v5.8.0.202006091008-r

There is no functional change from the currently used version. The
only new commit is the one that sets the version:

8e79d5a29 - JGit v5.8.0.202006091008-r

Change-Id: I1a4e3b03ec3c7ea358ecd61eed80ecd83e7b5b22

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