zlib 2.0.3 patch to support GCC MPICC
use patched zlib 2.0.3 that also works with GCC MPICC (was a bugfix).
This should remove anyone's need for -Dzlib_legacy
use patched zlib 2.0.3 that also works with GCC MPICC (was a bugfix).
This should remove anyone's need for -Dzlib_legacy