[GHC] #11676: Preserve name of original function in worker name

[GHC]

#11676: Preserve name of original function in worker name
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        Reporter:  bgamari           |                Owner:
            Type:  feature request   |               Status:  patch
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1970
       Wiki Page:                    |
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Changes (by bgamari):

 * status:  new => patch
 * differential:   => Phab:D1970


Comment:

 Phab:D1970 is an attempt at coercing `makeTrivialWithInfo` into generating
 more useful names.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11676#comment:3>
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