clean backport to jfx20u. The fix solves the build issue on the macOx11_64 machine. It fixes the intermittent build issue. The build issue occurs without the fix and does not occur with the fix.
------------- Commit messages: - Backport 810bd90d5089364067549b8ba299300bfd208357 Changes: https://git.openjdk.org/jfx20u/pull/11/files Webrev: https://webrevs.openjdk.org/?repo=jfx20u&pr=11&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8286089 Stats: 26 lines in 1 file changed: 26 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jfx20u/pull/11.diff Fetch: git fetch https://git.openjdk.org/jfx20u.git pull/11/head:pull/11 PR: https://git.openjdk.org/jfx20u/pull/11
