apache/spark — pull request #1216 by gballet (2014-06-25 22:26:13+00:00)
Title: [SPARK 2233] make-distribution script should list the git hash in the RELEASE file

This patch adds the git revision hash (short version) to the RELEASE file. It uses git instead of simply checking for the existence of .git, so as to make sure that this is a functional repository.