spark git commit: Copy pyspark and SparkR packages to latest release dir too

Repository: spark Updated Branches: refs/heads/branch-2.1 e8f351f9a -> 2c88e1dc3 Copy pyspark and SparkR packages to latest release dir too ## What changes were proposed in this pull request? Copy pyspark and SparkR packages to latest release dir, as per comment

spark git commit: Copy pyspark and SparkR packages to latest release dir too

Repository: spark Updated Branches: refs/heads/master 934035ae7 -> c074c96dc Copy pyspark and SparkR packages to latest release dir too ## What changes were proposed in this pull request? Copy pyspark and SparkR packages to latest release dir, as per comment