[GHC] #2243: review and apply small patch removing no longer existing modules from ghc package db

[GHC]

#2243: review and apply small patch removing no longer existing modules from ghc
package db
--------------------------+-------------------------------------------------
    Reporter:  MarcWeber  |       Owner:              
        Type:  task       |      Status:  new         
    Priority:  normal     |   Component:  Build System
     Version:  6.8.2      |    Severity:  minor       
    Keywords:             |    Testcase:              
Architecture:  Unknown    |          Os:  Unknown     
--------------------------+-------------------------------------------------
 See patch description.
 Another small hasktags patch making it find more tags is included as well

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2243>
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The Glasgow Haskell Compiler