[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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Comment (by bgamari):

 I unfortunately just noticed that the commit message of the commit in
 comment:4 no longer reflects what the commit itself implements. The
 simplifier does not maintain a stack of contexts; instead we simply pass
 the context name in from the various call-sites of `makeTrivial` and
 friends.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11676#comment:5>
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