hg: openjfx/8/graphics/rt: RT-33607 correct warnings about redefining __USE_GNU

[hang.vo at oracle.com]

Changeset: 6626ff47763a
Author:    ddhill
Date:      2013-10-16 09:24 -0400
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/6626ff47763a

RT-33607 correct warnings about redefining __USE_GNU
reviewer: kcr

! modules/graphics/src/main/native-prism-es2/PrismES2Defs.h