[GHC] #12599: Add Hadrian build artifacts to gitignore

[GHC]

#12599: Add Hadrian build artifacts to gitignore
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  bgamari
            Type:  task              |               Status:  closed
        Priority:  normal            |            Milestone:  8.10.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8040             |  Differential Rev(s):  Phab:D2530
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by snowleopard):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 I'm pretty sure this ticket has been resolved a long time ago, so I'm
 closing it.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12599#comment:13>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler