[11u] RFR (S): 8250876: Fix issues with cross-compile on macos

[Vladimir Kempik]

Hello
Looks good
not a reviewer tho, just an author of original fix.

Regards, Vladimir.

> 28 апр. 2021 г., в 19:50, Hohensee, Paul <hohensee at amazon.com> написал(а):
> 
> Please review this backport to allow cross-compiles for macOS aarch64 builds. Patch has already been backported to 15u.
> 
> Original issue: https://bugs.openjdk.java.net/browse/JDK-8250876
> Original patch: https://hg.openjdk.java.net/jdk/jdk/rev/64490f533d62
> 11u webrev: http://cr.openjdk.java.net/~phh/8250876/webrev.11u.00/
> 
> The patch to toolchain.m4 required changing macros with a UTIL prefix to use a BASIC prefix. Otherwise clean.
> 
> Tested by building on x64 macOS with Xcode 12.
> 
> Thanks,
> Paul
>