patch applied (ghc-6.12/packages/Cabal): Registering packages needs all the package dbs listed

[Ian Lynagh]

Fri Dec 11 05:32:33 PST 2009  Duncan Coutts <duncan at haskell.org>
  * Registering packages needs all the package dbs listed
  Important for the case of registering inplace when we're using a
  specific package db, e.g. when doing isolated builds.

    M ./Distribution/Simple/Build.hs -1 +2
    M ./Distribution/Simple/Compiler.hs -1 +1
    M ./Distribution/Simple/GHC.hs -9 +9
    M ./Distribution/Simple/Program/HcPkg.hs -9 +23
    M ./Distribution/Simple/Register.hs -21 +21