llvmbot monitor: Add "First Failing" and "Failing Since" columns

- The "First Failing" column contains a link to the first failed
  build, if the bot has been failing for several builds.

- The "Failing Since" column shows the time elapsed since that first
  failed build finished. This can be useful for detecting bots which
  fail for a long time.
  This column will be colored in red if that time is >24h.

Change-Id: I19878c922c65f8a9f5548ab8e3ea942a57c5a1f6
2 files changed
tree: 7398c3eea51cef10dc1c85818963715983f6a963
  1. bisect/
  2. helpers/
  3. monitor/
  4. release/
  5. stress/
  6. test-suite/
  7. .gitreview
  8. README.txt