[GHC] #15251: Add support for _mm_shuffle_pi8 intrinsic

[GHC]

#15251: Add support for _mm_shuffle_pi8 intrinsic
-------------------------------------+-------------------------------------
           Reporter:  newhoggy       |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Compiler       |           Version:  8.4.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 {{{!#c
 __m64 _mm_shuffle_pi8 (__m64 a, __m64 b)
 }}}

 See:

 https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_mm_shuffle_pi8

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15251>
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