Add new perfetto roller account to AUTHORS bypass whitelist

Bug: skia:8060
Change-Id: I7440c4560c788a2c179ddf43fbde8bd9a121272b
Reviewed-on: https://chromium-review.googlesource.com/1092751Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Eric Boren <borenet@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565647}

PRESUBMIT.py

@@ -656,7 +656,8 @@ _ALL_PYDEPS_FILES = _ANDROID_SPECIFIC_PYDEPS_FILES + _GENERIC_PYDEPS_FILES
 _KNOWN_ROBOTS = set(
     '%s-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com' % s
     for s in ('afdo', 'angle', 'catapult', 'chromite', 'depot-tools',
-              'fuchsia-sdk', 'nacl', 'pdfium', 'skia', 'src-internal', 'webrtc')
+              'fuchsia-sdk', 'nacl', 'pdfium', 'perfetto', 'skia',
+              'src-internal', 'webrtc')
   ) | set('%s@appspot.gserviceaccount.com' % s for s in ('findit-for-me',))