[GHC] #15335: Export `findImportUsage` from `rename/RnNames.hs` module

[GHC]

#15335: Export `findImportUsage` from `rename/RnNames.hs` module
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        Reporter:  chshersh          |                Owner:  (none)
            Type:  feature request   |               Status:  merge
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
                                     |  imports,refactoring,export
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4927
       Wiki Page:                    |
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Changes (by bgamari):

 * status:  patch => merge


-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15335#comment:3>
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