patch applied (ghc-6.6/ghc): Rework the block allocator

[Ian Lynagh]

Thu Dec 14 03:09:01 PST 2006  Simon Marlow <simonmar at microsoft.com>
  * Rework the block allocator
  
  The main goal here is to reduce fragmentation, which turns out to be
  the case of #743.  While I was here I found some opportunities to
  improve performance too.  The code is rather more complex, but it also
  contains a long comment describing the strategy, so please take a look
  at that for the details.

    M ./includes/Block.h +44
    M ./rts/BlockAlloc.c -202 +479
    M ./rts/Storage.c -8 +1