[GHC] #9912: Allow access to full logs in Harbormaster builds

[GHC]

#9912: Allow access to full logs in Harbormaster builds
-------------------------------------+-------------------------------------
       Reporter:  goldfire           |                   Owner:  hvr
           Type:  bug                |                  Status:  new
       Priority:  normal             |               Milestone:
      Component:  Trac & Git         |                 Version:  7.8.3
       Keywords:                     |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Unknown            |         Type of failure:
     Blocked By:                     |  None/Unknown
Related Tickets:                     |               Test Case:
                                     |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
 Harbormaster helpfully tries building every commit and every differential
 revision. However, when it fails, we only get the tail of the output, with
 no way to get more information.

 A case in point is
 [https://phabricator.haskell.org/harbormaster/build/2736/ this build],
 where a performance test case failed with `[stat too good]`. In this
 particular case, the commit is intended to be an optimization, so this
 failure is not terribly unexpected. I wanted to update `all.T` with the
 new figure, but I couldn't get the figure that Harbormaster's
 configuration had. Instead, I had to run the test on my machine (a Mac),
 get a different number, and hope that Harbormaster's configuration fell
 within 5% of mine. It did, in this case, but might not next time.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9912>
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