Bug#555714: mpich2: Please add support for blcr

[Alan Woodland]

Ok, that makes sense to wait for 1.3.x then I guess. I also forgot in
my patch to point out that BLCR only exists in Debian for i386, amd64,
armel and powerpc.

The patch I submitted for OpenMPI which enabled BLCR support did
indeed add an extra binary package, openmpi-checkpoint which avoids
linking/depending on libcr0 unless you want the checkpoint support. I
couldn't see a similar way to achieve this functionality in MPICH2
though.

Alan