File _multibuild of Package mpich

<multibuild>
  <package>standard</package>
  <package>testsuite</package>
  <package>ofi</package>
  <package>ofi-testsuite</package>
  <package>gnu-hpc</package>
  <package>gnu-hpc-testsuite</package>
  <package>gnu-hpc-ofi</package>
  <package>gnu-hpc-ofi-testsuite</package>
</multibuild>