[GHC] #5218: Add unpackCStringLen# to create Strings from string literals

[GHC]

#5218: Add unpackCStringLen# to create Strings from string literals
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              Reporter:  tibbe       |            Owner:  thoughtpolice
                  Type:  feature     |           Status:  new
  request                            |        Milestone:  7.10.1
              Priority:  normal      |          Version:  7.0.3
             Component:  Compiler    |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  Runtime     |  Related Tickets:  5877
  performance bug                    |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by thomie):

 * failure:  None/Unknown => Runtime performance bug


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5218#comment:27>
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