[GHC] #10234: Validate fails on armhf

[GHC]

#10234: Validate fails on armhf
-------------------------------------+-------------------------------------
              Reporter:  erikd       |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:  7.12.1
             Component:  Build       |           Version:  7.11
  System                             |  Operating System:  Unknown/Multiple
              Keywords:  llvm        |   Type of failure:  Other
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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 The failure is:

 {{{
 /usr/bin/install -c -m 644  libraries/prologue.txt "/home/erikd/ghc-
 git/bindisttest/install   dir/share/doc/ghc/html/libraries/"
 /usr/bin/install -c -m 755  libraries/gen_contents_index "/home/erikd/ghc-
 git/bindisttest/install   dir/share/doc/ghc/html/libraries/"
 bindisttest/"install   dir"/bin/runghc bindisttest/HelloWorld >
 bindisttest/output
 diff -U 1 bindisttest/output bindisttest/expected_output
 bindisttest/"install   dir"/bin/ghc --make bindisttest/HelloWorld
 [1 of 1] Compiling Main             ( bindisttest/HelloWorld.lhs,
 bindisttest/HelloWorld.o )

 <no location info>:
     Warning: Couldn't figure out LLVM version!
              Make sure you have installed LLVM
 ghc: could not execute: opt
 }}}

 Since this is armhf, this was built with llvm, and the configure process
 found the correct versions of the llvm tools; ie `/usr/bin/llc-3.6` and
 `/usr/bin/opt-3.6`. Furthermore, file `inplace/lib/settings` file
 specifies the correct versions.

 However, file `bindisttest/install   dir/lib/ghc-7.11.20150402/settings`
 file just uses `llc` and `opt` which don't actually exist.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10234>
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