Nearly clean backport to jfx17u (trivial conflict in the diff for the copyright line in two files).
CI build run on all three platforms. ------------- Commit messages: - 8294400: Provide media support for libavcodec version 59 Changes: https://git.openjdk.org/jfx17u/pull/96/files Webrev: https://webrevs.openjdk.org/?repo=jfx17u&pr=96&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8294400 Stats: 140 lines in 10 files changed: 108 ins; 0 del; 32 mod Patch: https://git.openjdk.org/jfx17u/pull/96.diff Fetch: git fetch https://git.openjdk.org/jfx17u pull/96/head:pull/96 PR: https://git.openjdk.org/jfx17u/pull/96