patch applied (cabal-branches/cabal-1.8): MERGED: Registering packages needs all the package dbs listed

[Duncan Coutts]

Sat Mar 20 06:57:48 PDT 2010  Duncan Coutts <duncan at haskell.org>
  * MERGED: Registering packages needs all the package dbs listed
  Special version for the 1.8 branch that does not change the external API
  Duplicates some internal code instead.

    M ./Distribution/Simple/GHC.hs -8 +7
    M ./Distribution/Simple/Register.hs -23 +88