File README.md of Package openmpi4

## Build Results

Current state of openmpi4 in openSUSE:Factory is

![Factory build results](https://br.opensuse.org/status/openSUSE:Factory/openmpi4/standard)

The current state of openmpi4 in the devel project build (science:HPC)

![Devel project build results](https://br.opensuse.org/status/science:HPC/openmpi4)