[GHC] #5308: Generalize -msse2 command line flag to -msse<version number>

[GHC]

#5308: Generalize -msse2 command line flag to -msse<version number>
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        Reporter:  tibbe             |            Owner:
            Type:  feature request   |           Status:  closed
        Priority:  low               |        Milestone:  7.6.2
       Component:  Compiler          |          Version:  7.0.4
      Resolution:  fixed             |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by gmainland):

 I added support for -mavx* on the simd branch. Could be cherry-picked
 after review.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5308#comment:8>
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