Fix GN auto-roller to handle results from buildbucket-initiated jobs.

It looks like we can get returned a try job state value of -1 now
when the try jobs are run through buildbucket instead of rietveld,
so this change updates the status mapping accordingly.

R=brettw@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1336713002

Cr-Original-Commit-Position: refs/heads/master@{#348266}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 84ffc7ef400da2351d559211bcdeeba20634df54
1 file changed
tree: f2d87fe7bbde0c04173ec47b302243f85345a869
  1. tools/