Supress error in P4RuntimeSerializer for default entry of unknown type
Supress error in P4RuntimeSerializer for default entry of unknown type

- static entries for a table with a selector (or other) key component
  that is not relevant for the entry need a placeholder default for that
  key component, which should just be ignored.

p4lang/p4c,hanw/p4c,hanw/p4c,p4lang/p4c,mbudiu-vmw/p4c-clone,mbudiu-vmw/p4c-clone,mbudiu-vmw/p4c-clone,mbudiu-vmw/p4c-clone,p4lang/p4c,hanw/p4c,hanw/p4c,p4lang/p4c,p4lang/p4c