[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:  archblob
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  7.10.3
       Component:  GHCi              |              Version:  6.6.1
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D194
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Comment (by archblob):

 I talked with @thomie on #ghc right after the ticked was opened again and
 the second problem was just a mistake and there is no problem with the
 patch, but there is indeed a problem with the test.
 I have looked into it then but I did not find a solution that was
 guaranteed not to break in the future(I looked for a library that was
 guaranteed to be present on both systems).

 What we could do instead is build one as part of the test and try to load
 that.
 If you think that is ok I'll go ahead and make a patch.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1407#comment:24>
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