Add known issue about confusing log. am: c21ce02da1
Add known issue about confusing log. am: c21ce02da1

Original change: https://android-review.googlesource.com/c/platform/external/perfetto/+/1567366

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4c7af13d567d7e260e95bd7501320128deb88c08

google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto