Allow VOID to be constexpr
Allow VOID to be constexpr

mrdomino/capnproto,jparyani/capnproto,mologie/capnproto,hntrmrrs/capnproto,jparyani/capnproto,mologie/capnproto,pjulien/capnproto,pjulien/capnproto,pjulien/capnproto,hntrmrrs/capnproto,mrdomino/capnproto,hntrmrrs/capnproto,mologie/capnproto,jparyani/capnproto,mrdomino/capnproto