patch applied (ghc): added node to push a closure onto the current call context

[nr at eecs.harvard.edu]

Mon Sep 17 10:29:39 PDT 2007  Norman Ramsey <nr at eecs.harvard.edu>
  * added node to push a closure onto the current call context

    M ./compiler/cmm/CmmCvt.hs -2 +3
    M ./compiler/cmm/CmmLiveZ.hs +1
    M ./compiler/cmm/CmmSpillReload.hs +1
    M ./compiler/cmm/MkZipCfgCmm.hs -1 +5
    M ./compiler/cmm/ZipCfgCmmRep.hs -10 +27