[GHC] #1407: Add the ability to :set -l{foo} in .ghci files

[GHC]

#1407: Add the ability to :set -l{foo} in .ghci files
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        Reporter:  guest       |            Owner:
            Type:  feature     |           Status:  patch
  request                      |        Milestone:  ⊥
        Priority:  normal      |          Version:  6.6.1
       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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Changes (by archblob):

 * cc: hvr (added)
 * status:  new => patch


Comment:

 There may be some nuances in the whole linking stuff that I don't
 understand, so please review. As far as I can tell the patch works as
 expected.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1407#comment:12>
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