Update libcontainer

Replaced github.com/docker/libcontainer with
github.com/opencontainers/runc/libcontaier.
Also I moved AppArmor profile generation to docker.

Main idea of this update is to fix mounting cgroups inside containers.
After updating docker on CI we can even remove dind.

Signed-off-by: Alexander Morozov <lk4d4@docker.com>

homedir/homedir.go

@@ -4,7 +4,7 @@ import (
 	"os"
 	"runtime"
 
-	"github.com/docker/libcontainer/user"
+	"github.com/opencontainers/runc/libcontainer/user"
 )
 
 // Key returns the env var name for the user's home dir based on

sockets/unix_socket.go

@@ -11,7 +11,7 @@ import (
 
 	"github.com/Sirupsen/logrus"
 	"github.com/docker/docker/pkg/listenbuffer"
-	"github.com/docker/libcontainer/user"
+	"github.com/opencontainers/runc/libcontainer/user"
 )
 
 func NewUnixSocket(path, group string, activate <-chan struct{}) (net.Listener, error) {

sysinfo/sysinfo_linux.go

@@ -7,7 +7,7 @@ import (
 	"strings"
 
 	"github.com/Sirupsen/logrus"
-	"github.com/docker/libcontainer/cgroups"
+	"github.com/opencontainers/runc/libcontainer/cgroups"
 )
 
 // New returns a new SysInfo, using the filesystem to detect which features the kernel supports.