Log Message:
Update mpich to 3.2.1.

Patch from Eric A. Borisch via pull request.
Closes NetBSD/pkgsrc#38.

Remove patches no longer needed; migrate to configure option for rpath.

===============================================================================
                               Changes in 3.2.1
===============================================================================

 # Fixes for platforms with strict memory alignment requirements.

 # Fixes for MPI_Win info management.

 # Fixed a progress bug with MPI generalized requests.

 # Fixed multiple integer overflow bugs in CH3 and ROMIO.

 # Improved detection for Fortran 2008 binding support.

 # Enhanced support for libfabric (OFI) netmod.

 # Several other minor bug fixes, memory leak fixes, and code cleanup.

   A full list of changes is available at the following link:

     http://git.mpich.org/mpich.git/shortlog/v3.2..v3.2.1