spice-protocol/spice/enums.h: rebuild from spice.proto
spice-protocol/spice/enums.h: rebuild from spice.proto

This file was hand generated until now, resulting in the wierd situation where
it is different for spice-gtk and spice-server even though they both use the
same spice-common and spice-protocol (or at least close) versions.

This patch generates the enums.h files from spice-common. While that file is
actually in the spice-protocol submodule, it cannot be generated from
spice-protocol since it lacks access to spice.proto and spice_codegen.py. So in
affect whenvever it will differ the spice-protocol module will become dirty and
hence hopefully commited with the new enums.h.

enums.h is generated from spice.proto is a superset of that generated from spice1.proto.

fgouget/spice-common,elmarco/spice-common,fgouget/spice-common,fgouget/spice-common,freedesktop-unofficial-mirror/spice__spice-common,elmarco/spice-common,Fantu/spice-common,elmarco/spice-common,Fantu/spice-common,freedesktop-unofficial-mirror/spice__spice-common,freedesktop-unofficial-mirror/spice__spice-common,SPICE/spice-common,Fantu/spice-common,SPICE/spice-common,fgouget/spice-common,Fantu/spice-common,freedesktop-unofficial-mirror/spice__spice-common,SPICE/spice-common,elmarco/spice-common