hg: openjfx/9-dev/rt: 8163196: Build should fail fast with unsupported OS/ARCH

[david.hill at oracle.com]

Changeset: 03a00524bb4d
Author:    ddhill
Date:      2016-08-04 13:49 -0400
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/03a00524bb4d

8163196: Build should fail fast with unsupported OS/ARCH
Reviewed-by: kcr

! build.gradle