Add catapult roller to AUTHORS bypass list

I missed this account on my last CL.

Bug: 799919
Change-Id: I8cd866cfed3c0a846cc20e2135a4a92b372bf608
Reviewed-on: https://chromium-review.googlesource.com/893440Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Eric Boren <borenet@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532898}

PRESUBMIT.py

@@ -532,8 +532,8 @@ _ALL_PYDEPS_FILES = _ANDROID_SPECIFIC_PYDEPS_FILES + _GENERIC_PYDEPS_FILES
 # Bypass the AUTHORS check for these accounts.
 _KNOWN_ROBOTS = set(
   '%s-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com' % s
-  for s in ('angle', 'depot-tools', 'nacl', 'pdfium', 'skia', 'src-internal',
-            'webrtc'))
+  for s in ('angle', 'catapult', 'depot-tools', 'nacl', 'pdfium', 'skia',
+            'src-internal', 'webrtc'))
 
 
 def _CheckNoProductionCodeUsingTestOnlyFunctions(input_api, output_api):