Android: Add a note to .expectation failures about spaces

Change-Id: Ieb6ab62823b5f998e3542dcedcdb57ffb32e87f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1900623
Auto-Submit: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Commit-Queue: Mohamed Heikal <mheikal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713036}

build/android/gyp/util/diff_utils.py

@@ -35,6 +35,9 @@ Files Compared:
   * {}
   * {}
 
+If you are looking at this through LogDog, click "Raw log" before copying.
+See https://bugs.chromium.org/p/chromium/issues/detail?id=984616.
+
 To update the file, run:
 ########### START ###########
  patch -p1 <<'END_DIFF'