Update whitespace.txt
Update whitespace.txt

This is an imported pull request from
https://github.com/google/skia-buildbot/pull/17

GitOrigin-RevId: 18ddf56e3f984db265ded1553c2ad117d381d5a5
Change-Id: Ib4b560f8159eb0edf6649e26c95207b215ab9a18
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/334822
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