git: openjdk/jfx: master: 8266743: Crash on macOS 10.11 due to ignored @available 10.12 check

[Kevin Rushforth]

Changeset: 6fe427f9
Author:    Kevin Rushforth <kcr at openjdk.org>
Date:      2021-07-07 12:31:07 +0000
URL:       https://git.openjdk.java.net/jfx/commit/6fe427f9a20aace1466530bd0029af9f7ff7329a

8266743: Crash on macOS 10.11 due to ignored @available 10.12 check

Reviewed-by: jvos

! buildSrc/mac.gradle