Sync with criu comit d51625715110f4b2ffe16a75c98f2704964dbf73

 - show_siginfo differ in prototype
 - GEN_SHOW_STUB need obj argument
 - _CR_FD_NS_ -> _CR_FD_NETNS

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
socket: Sync with criu fe3fb8851e682aa3513d615224a79f3ce6e741d0

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
net: Sync with criu b1b02fe676e6e4a7e8065fc9d934ede7be255ff3

In commit b1b02fe676e6e4a7e8065fc9d934ede7be255ff3
CR_FD_MNTS become been out of NS entries, moreover
_CR_FD_IPCNS_FROM introduced there as well. So we
rename @fdset_ns to @fdset_netns and open CR_FD_MNTS
explicitly.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>