[jfx11u] RFR: 8266554: Change default macOS min version for aarch64 to 11.0

[Kevin Rushforth]

On Tue, 18 May 2021 20:05:03 GMT, Johan Vos <jvos at openjdk.org> wrote:

> Require at least MacOSX 11.0 to build on mac-AArch64.
> Don't increase minimum SDK version when building on x86-64 (contrary to JDK-8265031)

Marked as reviewed by kcr (Lead).

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PR: https://git.openjdk.java.net/jfx11u/pull/21