patch applied (packages/regex-posix): make Setup suitable for building the libraries with GHC

[Ian Lynagh]

Sun Nov 12 13:47:21 PST 2006  Ian Lynagh <igloo at earth.li>
  * make Setup suitable for building the libraries with GHC

     ./Setup.hs -> ./Setup.lhs
    M ./Setup.lhs -3 +52
    M ./regex-posix.cabal -1 +2