RFR: 8329874: JavaFX debug builds fail on Linux

[Jay Bhaskar]

Issue: JavaFX debug builds fail on Linux
The failure is permission issue on javascript core scripts that generates built in functions, the script has no write and execute permission permission.

Solution : Use copy of scripts not from JavaScriptCore source with right permission  ( OWNER_EXECUTE).

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Commit messages:
 - 8329874: JavaFX debug builds fail on Linux

Changes: https://git.openjdk.org/jfx/pull/1902/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1902&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329874
  Stats: 4 lines in 2 files changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jfx/pull/1902.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1902/head:pull/1902

PR: https://git.openjdk.org/jfx/pull/1902