File _multibuild of Package netcdf

<multibuild>
  <package>serial</package>
  <package>openmpi5</package>
  <package>gnu-openmpi5-hpc</package>
  <!--
  <package>gnu-hpc</package>
  <package>gnu-mvapich2-hpc</package>
  <package>gnu-mpich-hpc</package>
  -->
</multibuild>