hg: openjfx/jfx-dev/rt: 8215435: Warn on usage of trampolines with gcc

[kevin.rushforth at oracle.com]

Changeset: 356023276b17
Author:    kcr
Date:      2019-01-16 11:34 -0800
URL:       http://hg.openjdk.java.net/openjfx/jfx-dev/rt/rev/356023276b17

8215435: Warn on usage of trampolines with gcc
Reviewed-by: jvos

! 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