gclient: Don't die on empty .gclient_entries file
gclient: Don't die on empty .gclient_entries file

Bug: 707313
Change-Id: Ic3860aa6b9aeaba3ec02ab8dac8dd63429f917cc
Reviewed-on: https://chromium-review.googlesource.com/466688
Reviewed-by: Erik Staab <9e0728822fdb2ce07b011b42510312bb837e6a51@chromium.org>
Commit-Queue: Aaron Gable <bbed39beedae4cdb499af742d2fcd6c63934d93b@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools