[CRIU] [PATCH phaul] Fix rpc module name change

[Cyrill Gorcunov]

On Fri, Dec 02, 2016 at 02:06:08PM +0300, Cyrill Gorcunov wrote:
> In criu commit f3e412f9004486cbfab285bedf8d47d421551f8a
> the RPC module has been renamed to rpc_pb2.py thus we
> have to reflect this change here too.
> 
> Signed-off-by: Cyrill Gorcunov <gorcunov at gmail.com>

As to me the former commit above is API breakage because
side projects like p.haul is simply broken now.