add automation script

hack/jenkins/kicbase_auto_build.sh

+#!/bin/bash
+
+./hack/jenkins/installers/check_install_docker.sh
+yes|gcloud auth configure-docker
+now=$(date +%s)
+export KV=$(egrep "Version =" pkg/drivers/kic/types.go | cut -d \" -f 2 | cut -d "-" -f 1)
+export KIC_VERSION=$KV-$now-$ghprbPullId
+export KICBASE_IMAGE_REGISTRIES=gcr.io/k8s-minikube/kicbase-builds:$KIC_VERSION
+yes|make push-kic-base-image
+
+docker pull $KICBASE_IMAGE_REGISTRIES
+fullsha=$(docker inspect --format='{{index .RepoDigests 0}}' $KICBASE_IMAGE_REGISTRIES)
+sha=$(echo ${fullsha} | cut -d ":" -f 2)
+
+message="Hi ${ghprbPullAuthorLoginMention},
+
+A new kicbase image is available, please update your PR with the new tag and SHA.
+In pkg/drivers/kic/types.go:
+
+	// Version is the current version of kic
+	Version = \"${KICBASE_IMAGE_REGISTRIES}\"
+	// SHA of the kic base image
+	baseImageSHA = \"${sha}\"
+"
+
+curl -s -H "Authorization: token ${access_token}" \
+	 -H "Accept: application/vnd.github.v3+json" \
+	 -X POST -d "{\"body\": \"${message}\"}" "https://api.github.com/repos/kubernetes/minikube/issues/$ghprbPullId/comments"