Initial jenkinsfile (#306)

Signed-off-by: Mike Dougherty <mike.dougherty@docker.com>

Jenkinsfile

@@ -0,0 +1,13 @@
+wrappedNode(label: "linux && x86_64") {
+  deleteDir()
+  checkout scm
+
+  stage "build image"
+  def img = docker.build("dockerbuildbot/containerd:${gitCommit()}")
+  try {
+    stage "run tests"
+    sh "docker run --privileged --rm --name '${env.BUILD_TAG}' ${img.id} make test"
+  } finally {
+    sh "docker rmi -f ${img.id} ||:"
+  }
+}