DEPS.xwalk: Roll chromium-crosswalk (e60998d -> 945fe6f).

* 945fe6f Merge pull request #179 from rakuco/fix-indentation-in-adb-install-apk
* 1e1c8aa [Temp][Android] Fix 8c2a8abc.

This fixes the Android devices tests, which were not being updated due
to a syntax error in the adb_install_apk.py script caused by the M37
rebase.