Update runc to introduce RelabelNeeded function

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

hack/vendor.sh

@@ -48,7 +48,9 @@ clone git github.com/endophage/gotuf 2df1c8e0a7b7e10ae2113bf37aaa1bf1c1de8cc5
 clone git github.com/jfrazelle/go v1.5.1-1
 clone git github.com/agl/ed25519 d2b94fd789ea21d12fac1a4443dd3a3f79cda72c
 
-clone git github.com/opencontainers/runc 6c198ae2d065c37f44316e0de3df7f3b88950923 # libcontainer
+# this runc commit from branch relabel_fix_docker_1.9.1, pls remove it when you
+# update next time
+clone git github.com/opencontainers/runc 1349b37bd56f4f5ce2690b5b2c0f53f88a261c67 # libcontainer
 # libcontainer deps (see src/github.com/opencontainers/runc/Godeps/Godeps.json)
 clone git github.com/coreos/go-systemd v3
 clone git github.com/godbus/dbus v2

vendor/src/github.com/opencontainers/runc/libcontainer/label/label.go

@@ -65,6 +65,11 @@ func Validate(label string) error {
 	return nil
 }
 
+// RelabelNeeded checks whether the user requested a relabel
+func RelabelNeeded(label string) bool {
+	return false
+}
+
 // IsShared checks that the label includes a "shared" mark
 func IsShared(label string) bool {
 	return false

vendor/src/github.com/opencontainers/runc/libcontainer/label/label_selinux.go

@@ -181,6 +181,11 @@ func Validate(label string) error {
 	return nil
 }
 
+// RelabelNeeded checks whether the user requested a relabel
+func RelabelNeeded(label string) bool {
+	return strings.Contains(label, "z") || strings.Contains(label, "Z")
+}
+
 // IsShared checks that the label includes a "shared" mark
 func IsShared(label string) bool {
 	return strings.Contains(label, "z")