patch applied (ghc): xcode build target for fixed /Library/Frameworks inst

[chak at cse.unsw.edu.au]

Mon Feb  4 19:00:47 PST 2008  Manuel M T Chakravarty <chak at cse.unsw.edu.au>
  * xcode build target for fixed /Library/Frameworks inst
  - Also moving all MacOS-specific Makefile components into 
    distrib/MacOS/Makefile

    M ./Makefile -31 +27
    M ./compiler/main/SysTools.lhs -1 +7
    M ./distrib/MacOS/GHC.xcodeproj/project.pbxproj -6 +108
    A ./distrib/MacOS/Makefile