[GHC] #16165: Move Hadrian (github) wiki information to in-tree docs

[GHC]

#16165: Move Hadrian (github) wiki information to in-tree docs
-------------------------------------+-------------------------------------
           Reporter:  alpmestan      |             Owner:  (none)
               Type:  task           |            Status:  new
           Priority:  normal         |         Milestone:  8.8.1
          Component:  Build System   |           Version:
  (Hadrian)                          |
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 https://github.com/snowleopard/hadrian/wiki contains useful information
 about debugging/testing/profiling Hadrian. We definitely want to move this
 in the source tree. I'll take care of this in the upcoming weeks (this is
 not the most urgent Hadrian task, to be honest), unless someone beats me
 to it.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16165>
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