GVT-g interface changes
GVT-g interface changes

Signed-off-by: John Else <37b74501daa612e48fea94f9846ed4ddeb6a8f07@citrix.com>

Chunjie/xcp-idl,johnelse/xcp-idl,xapi-project/message-switch,euanh/xcp-idl,xapi-project/message-switch,xapi-project/message-switch,djs55/xcp-idl