[GHC] #8172: Expose CWD and import search paths in GHCi via new `:show paths` command

[GHC]

#8172: Expose CWD and import search paths in GHCi via new `:show paths` command
-------------------------------+-------------------------------------------
        Reporter:  hvr         |            Owner:  hvr
            Type:  feature     |           Status:  patch
  request                      |        Milestone:  7.8.1
        Priority:  normal      |          Version:  7.7
       Component:  GHCi        |         Keywords:
      Resolution:              |     Architecture:  Unknown/Multiple
Operating System:              |       Difficulty:  Easy (less than 1 hour)
  Unknown/Multiple             |       Blocked By:
 Type of failure:              |  Related Tickets:
  None/Unknown                 |
       Test Case:              |
        Blocking:              |
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Comment (by Herbert Valerio Riedel <hvr@…>):

 In [changeset:d4ef6c38b4b8badcfc198f5c25f05ea1fc8a9ebf/testsuite]:
 {{{
 #!CommitTicketReference repository="testsuite"
 revision="d4ef6c38b4b8badcfc198f5c25f05ea1fc8a9ebf"
 Add test-case for #8172

 Signed-off-by: Herbert Valerio Riedel <hvr at gnu.org>
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8172#comment:5>
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