patch applied (cabal): Fix local inplace registration for ghc-6.12

[Duncan Coutts]

Sat Mar 20 10:21:08 PDT 2010  Duncan Coutts <duncan at haskell.org>
  * Fix local inplace registration for ghc-6.12
  This is for the case of intra-package deps where the lib has to be
  registered into a local package db. We use "-inplace" suffix for
  the local installed package ids (rather than using an ABI hash).

    M ./Distribution/Simple/Build.hs -5 +13
    M ./Distribution/Simple/Configure.hs -2 +2
    M ./Distribution/Simple/LocalBuildInfo.hs +9