git: openjdk/jfx: 8226754: FX build fails using gradle 5.6+ or 6

[Kevin Rushforth]

Changeset: 64aaeb84
Author:    Kevin Rushforth <kcr at openjdk.org>
Date:      2019-10-14 15:37:12 +0000
URL:       https://git.openjdk.java.net/jfx/commit/64aaeb84

8226754: FX build fails using gradle 5.6+ or 6

Remove obsolete STABLE_PUBLISHING; explicitly set output.resourcesDir; bump minimum gradle version to 5.3

Reviewed-by: jvos

! build.gradle
! build.properties
! settings.gradle