[GHC] #10223: Cleanup `mk/build.mk.sample`

[GHC]

#10223: Cleanup `mk/build.mk.sample`
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        Reporter:  thomie            |                   Owner:  thomie
            Type:  task              |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by Thomas Miedema <thomasmiedema@…>):

 In [changeset:"b40e55954ecdab650d35349cbb93e53df952310e/ghc" b40e559/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="b40e55954ecdab650d35349cbb93e53df952310e"
 Build system: simplify *-llvm BuildFlavours (#10223)

 Note that SRC_HC_OPTS are added to every Haskell compilation. So
 there isn't any need to also add `-fllvm` to GhcStage1HcOpts,
 GhcStage2HcOpts and GhcLibHcOpts.

 Small bug fix: make sure we test for -fllvm in SRC_HC_OPTS, to check
 whether the bootstrap compiler is affected by bug #9439.

 Reviewed by: austin

 Differential Revision: https://phabricator.haskell.org/D1188
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10223#comment:9>
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