Bug#719814: Do not override user defined JAVA_HOME in the gradle start script

[Michael Stummvoll]

Package: gradle
Version: 1.4-2

Hi,

the start script for gradle overrides the JAVA_HOME environment if
there is set an user defined one

> export JAVA_HOME=/usr/lib/jvm/default-java

please just set it if its not already set.

> : ${JAVA_HOME:=/usr/lib/jvm/default-java}
> export JAVA_HOME

Kind Regards,
Michael