patch applied (ghc): change dirty_MUT_VAR() to use recordMutableCap()

[Simon Marlow]

Thu Feb  9 07:04:20 PST 2006  Simon Marlow <simonmar at microsoft.com>
  * change dirty_MUT_VAR() to use recordMutableCap()
  rather than recordMutableGen(), the former works better in SMP

    M ./ghc/compiler/codeGen/CgPrimOp.hs -1 +2
    M ./ghc/includes/RtsExternal.h -1 +1
    M ./ghc/includes/Storage.h -1 +1
    M ./ghc/rts/PrimOps.cmm -1 +1
    M ./ghc/rts/Storage.c -2 +3