We were missing the 'size' builtin type (which means that QAPI using
[ 'size' ] would fail to compile).
Signed-off-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>