llvm monitor: Ignore buildkite builds of release branches

Recently 14.x builds have been popping up so it's not enough
to just ignore those triggered from Phabricator reviews.

Change-Id: I1f8fc1928ee31a9cb913f83cc45bcea2c6a4baa5
1 file changed
tree: 8e4a45d7d9d3aa9c9a8c3a0877a127737f1c66b9
  1. bisect/
  2. helpers/
  3. monitor/
  4. release/
  5. stress/
  6. test-suite/
  7. .gitreview
  8. README.txt