[GHC] #8372: enable -dcmm-lint by default for .cmm input files

[GHC]

#8372: enable -dcmm-lint by default for .cmm input files
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              Reporter:  rwbarton    |            Owner:
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.7
             Component:  Compiler    |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by thomie):

 For reference, in  `rts/ghc.mk` we do have:
 {{{
 # We *want* type-checking of hand-written cmm.
 rts_HC_OPTS += -dcmm-lint
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8372#comment:1>
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