This prevents git from putting quotes around some file names
(those that have astral-plane characters) and not around others.

R=maruel

Bug: 792302
Recipe-Nontrivial-Roll: build
Recipe-Nontrivial-Roll: build_limited_scripts_slave
Change-Id: I3b6a6b36c4720116de811b40177b59aa25c263db
Reviewed-on: https://chromium-review.googlesource.com/815454
Commit-Queue: Aaron Gable <agable@chromium.org>
Reviewed-by: Marc-Antoine Ruel <maruel@chromium.org>