[GHC] #10275: LLVM/cross-compilation fixes to be backported

[GHC]

#10275: LLVM/cross-compilation fixes to be backported
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              Reporter:  rwbarton    |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Build       |           Version:  7.10.1
  System                             |  Operating System:  Unknown/Multiple
              Keywords:              |   Type of failure:  None/Unknown
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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 I'd like to have these fixes backported so that ghc-android will be able
 to build on 7.10.2 without having to duplicate patches that already exist
 in HEAD.

 The patches I needed are:

 - Phab:D597
 - Phab:D683
 - Phab:D745

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10275>
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