fix instructions for bootstrap step (thanks Balachandran Sivakumar)
fix instructions for bootstrap step (thanks Balachandran Sivakumar)

apache/incubator-groovy,paulk-asert/groovy,apache/incubator-groovy,apache/incubator-groovy,paulk-asert/groovy,apache/incubator-groovy,paulk-asert/groovy,apache/groovy,apache/groovy,apache/groovy,apache/groovy,paulk-asert/groovy