hg: openjfx/8/graphics/rt: RT-32842: Gradle uses wrong value for JAVA_HOME if not set

[hang.vo at oracle.com]

Changeset: 74c32db7de03
Author:    kcr
Date:      2013-09-11 16:01 -0700
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/74c32db7de03

RT-32842: Gradle uses wrong value for JAVA_HOME if not set
Reviewed-by: flar

! build.gradle