git: openjdk/jfx: master: 8241476: Linux build warnings issued on gcc 9

[Kevin Rushforth]

Changeset: 7044cefb
Author:    Thiago Milczarek Sayao <tsayao at openjdk.org>
Committer: Kevin Rushforth <kcr at openjdk.org>
Date:      2020-04-15 11:41:55 +0000
URL:       https://git.openjdk.java.net/jfx/commit/7044cefb

8241476: Linux build warnings issued on gcc 9

Reviewed-by: kcr, arapte

! buildSrc/linux.gradle
! modules/javafx.media/src/main/native/jfxmedia/projects/linux/Makefile