Auto merge of #3339 - SimonSapin:git-short-id, r=alexcrichton
authorbors <bors@rust-lang.org>
Mon, 28 Nov 2016 21:00:19 +0000 (15:00 -0600)
committerGitHub <noreply@github.com>
Mon, 28 Nov 2016 21:00:19 +0000 (15:00 -0600)
Use short IDs in git dependencies checkout path

… in order to contribute less to the path length limit on Windows: https://github.com/servo/servo/pull/14397


Trivial merge