[GitHub] incubator-spark pull request: Add c3 instance types to Spark EC2

[AmplabJenkins]

Github user AmplabJenkins commented on the pull request:

    https://github.com/apache/incubator-spark/pull/595#issuecomment-35013735
  
    All automated tests passed.
    Refer to this link for build results: 
https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/12709/