[jfx21u] RFR: 8317508: Provide media support for libavcodec version 60

[Alexander Matveev]

Clean backport of JDK-8317508.

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Commit messages:
 - Backport de456dad193f295a8bd93b72bb9b71960e6afd18

Changes: https://git.openjdk.org/jfx21u/pull/21/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx21u&pr=21&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8317508
  Stats: 12 lines in 4 files changed: 7 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jfx21u/pull/21.diff
  Fetch: git fetch https://git.openjdk.org/jfx21u.git pull/21/head:pull/21

PR: https://git.openjdk.org/jfx21u/pull/21