[engine][vendor] forks of containerd + runc + runtime-spec

This vendors from the docker org:
- containerd to 6e23458c129b551d5c9871e5174f6b1b7f6d1170
- runc to 810190ceaa507aa2727d7ae6f4790c76ec150bd2
- runtime-spec to a45ba0989fc26c695fe166a49c45bb8b7618ab36

This fixes two issues:
- if the container is paused, it now responds properly to SIGKILL
- on buggy kernels such as RHEL7.2, a int64->uint64 conversion bug
  prevented containers to start when memory cgroup was specified.

Signed-off-by: Tibor Vass <tibor@docker.com>

components/engine/hack/dockerfile/binaries-commits

@@ -3,8 +3,8 @@
 TOMLV_COMMIT=9baf8a8a9f2ed20a8e54160840c492f937eeaf9a
 
 # When updating RUNC_COMMIT, also update runc in vendor.conf accordingly
-RUNC_COMMIT=2d41c047c83e09a6d61d464906feb2a2f3c52aa4
-CONTAINERD_COMMIT=cfb82a876ecc11b5ca0977d1733adbe58599088a
+RUNC_COMMIT=810190ceaa507aa2727d7ae6f4790c76ec150bd2
+CONTAINERD_COMMIT=6e23458c129b551d5c9871e5174f6b1b7f6d1170
 TINI_COMMIT=949e6facb77383876aeff8a6944dde66b3089574
 LIBNETWORK_COMMIT=7b2b1feb1de4817d522cc372af149ff48d25028e
 VNDR_COMMIT=c56e082291115e369f77601f9c071dd0b87c7120

components/engine/hack/dockerfile/install-binaries.sh

@@ -29,7 +29,7 @@ install_runc() {
 
 install_containerd() {
 	echo "Install containerd version $CONTAINERD_COMMIT"
-	git clone https://github.com/containerd/containerd.git "$GOPATH/src/github.com/containerd/containerd"
+	git clone https://github.com/docker/containerd.git "$GOPATH/src/github.com/containerd/containerd"
 	cd "$GOPATH/src/github.com/containerd/containerd"
 	git checkout -q "$CONTAINERD_COMMIT"
 	make $1