RFR: 8257895: Allow building of JavaFX media libs for Apple Silicon [v2]

[Alexander Matveev]

> - Added support to compile media on arm.
> - libffi is based on 3.3.

Alexander Matveev has updated the pull request incrementally with one additional commit since the last revision:

  8257895: Allow building of JavaFX media libs for Apple Silicon [v2]

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Changes:
  - all: https://git.openjdk.java.net/jfx/pull/412/files
  - new: https://git.openjdk.java.net/jfx/pull/412/files/99f8788f..ca11a752

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=412&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=412&range=00-01

  Stats: 4 lines in 2 files changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jfx/pull/412.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/412/head:pull/412

PR: https://git.openjdk.java.net/jfx/pull/412