#4 recording ANY_SOURCE with standard Recv

[Matt Sottile]

Need to make sure the trace-fixer will record the actual peer used to fulfil
the MPI_ANY_SOURCE argument to the RECV (blocking). This should be
trivial, since it should be accessible within the PMPI_Recv function after
the blocking MPI_Recv returns, and can be resolved before it hits the trace
fixer script. Check on this too - bug was reported in the context of the
Intel MPI implementation. (Thanks to vchandu@cc.gatech.edu)