Update whitespace.txt
Update whitespace.txt

This is an imported pull request from
https://github.com/google/skia-buildbot/pull/13

GitOrigin-RevId: 790338015143063bf8d68856d99c5249d3029096
Change-Id: I93dd8f210aab238bfefe35d25a105d5c175e4fba
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/334387
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot