hg: openjfx/9-dev/rt: 8147951: Add a whitespace checking utility

[david.hill at oracle.com]

Changeset: 0baf599539de
Author:    ddhill
Date:      2016-01-21 11:58 -0500
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/0baf599539de

8147951: Add a whitespace checking utility
Reviewed-by: kcr

! build.gradle
+ tools/scripts/checkWhiteSpace
+ tools/scripts/files.style