[jfx18] RFR: 8281459: WebKit 613.1 build broken on M1

[Johan Vos]

Reviewed-by: kcr, jvos

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Commit messages:
 - 8281459: WebKit 613.1 build broken on M1

Changes: https://git.openjdk.java.net/jfx/pull/771/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=771&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8281459
  Stats: 20 lines in 1 file changed: 0 ins; 20 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/771.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/771/head:pull/771

PR: https://git.openjdk.java.net/jfx/pull/771