Update containerd

- in a much better state than previous commit, but still some issues
running system containers with it that need more work, so staying with `runc`.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

base/containerd/Dockerfile

@@ -2,12 +2,14 @@ FROM golang:1.7-alpine3.5
 RUN \
   apk update && apk upgrade -a && \
   apk add --no-cache \
+  btrfs-progs-dev \
   gcc \
   git \
   libc-dev \
+  linux-headers \
   make \
   && true
-ENV CONTAINERD_COMMIT=1dc5d652ac1adf8f0a92ee8eff7af07b129d4e21
+ENV CONTAINERD_COMMIT=0e0ae74b824c71f991de4765711a383450d60655
 RUN mkdir -p $GOPATH/src/github.com/docker && \
   cd $GOPATH/src/github.com/docker && \
   git clone https://github.com/docker/containerd.git