[GHC] #1631: Make the External Package Table contain ModDetails not ModIface

[GHC]

#1631: Make the External Package Table contain ModDetails not ModIface
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              Reporter:  simonpj     |            Owner:  ezyang
                  Type:  task        |           Status:  new
              Priority:  lowest      |        Milestone:  7.10.1
             Component:  Compiler    |          Version:  6.6.1
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by ezyang):

 * owner:   => ezyang


Comment:

 I need this for #9252: here, we may have a module in the EPT which we want
 to compare against an hsig we compiled locally, and we need a full
 `ModDetails` for this comparison and not just a stubbed out `ModIface`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1631#comment:15>
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