jfx11u uses gradle 5.3 for build, it needs to be upgraded to gradle 6.3 same as jfx mainline. This PR backports three fixes:
1. [JDK-8240539](https://bugs.openjdk.java.net/browse/JDK-8240539): Upgrade gradle to version 6.3 2. [JDK-8232063](https://bugs.openjdk.java.net/browse/JDK-8232063): Upgrade gradle to version 6.0 and 3. [JDK-8226754](https://bugs.openjdk.java.net/browse/JDK-8226754): FX build fails using gradle 5.6+ or 6 All the changes backport cleanly. ------------- Commit messages: - 8240539: Upgrade gradle to version 6.3 - 8232063: Upgrade gradle to version 6.0 - 8226754: FX build fails using gradle 5.6+ or 6 Changes: https://git.openjdk.java.net/jfx11u/pull/7/files Webrev: https://webrevs.openjdk.java.net/?repo=jfx11u&pr=7&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8240539 Stats: 31 lines in 6 files changed: 17 ins; 4 del; 10 mod Patch: https://git.openjdk.java.net/jfx11u/pull/7.diff Fetch: git fetch https://git.openjdk.java.net/jfx11u pull/7/head:pull/7 PR: https://git.openjdk.java.net/jfx11u/pull/7
