hg: openjfx/8/graphics/rt: RT-31986: Gradle: build should fail with meaningful error message if Java version is below minimum

[hang . vo]

Changeset: f9a6b2568deb
Author:    kcr
Date:      2013-07-30 09:26 -0700
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/f9a6b2568deb

RT-31986: Gradle: build should fail with meaningful error message if Java 
version is below minimum

! build.gradle
! build.properties