Add t.Run() call to TestGitFileURL
Add t.Run() call to TestGitFileURL

This was omitted due to an oversight. Without it, the test description
is not recorded.

AlCutter/trillian,Martin2112/trillian,Martin2112/trillian,Martin2112/trillian,gdbelvin/trillian,google/trillian,RJPercival/trillian,gdbelvin/trillian,google/trillian,gdbelvin/trillian,RJPercival/trillian,AlCutter/trillian