File README.md of Package mpich

## Build Results

Current state of mpich in openSUSE:Factory is

![Factory build results](https://br.opensuse.org/status/openSUSE:Factory/mpich/standard)

The current state of mpich in the devel project build (science:HPC)

![Devel project build results](https://br.opensuse.org/status/science:HPC/mpich)