hg: openjfx/9-dev/rt: 8172749: Enable additional compiler warnings for gcc

[kevin.rushforth at oracle.com]

Changeset: f43b32e5232d
Author:    kcr
Date:      2017-02-06 14:44 -0800
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/f43b32e5232d

8172749: Enable additional compiler warnings for gcc
Reviewed-by: ckyang, almatvee, cbensen

! buildSrc/linux.gradle
! modules/javafx.media/src/main/native/gstreamer/projects/linux/avplugin/Makefile
! modules/javafx.media/src/main/native/gstreamer/projects/linux/fxplugins/Makefile
! modules/javafx.media/src/main/native/gstreamer/projects/linux/gstreamer-lite/Makefile
! modules/javafx.media/src/main/native/jfxmedia/projects/linux/Makefile