File _multibuild of Package pnetcdf.16645

<multibuild>
  <package>mvapich2</package>
  <package>mpich</package>
  <package>openmpi1</package>
  <package>openmpi2</package>
  <package>openmpi3</package>
  <package>doc-hpc</package>
  <package>gnu-openmpi2-hpc</package>
  <package>gnu-openmpi3-hpc</package>
  <package>gnu-openmpi4-hpc</package>
  <package>gnu-mvapich2-hpc</package>
  <package>gnu-mpich-hpc</package>
</multibuild>