RFR: 8250876: Build system preparation to macos on aarch64

[Vladimir Kempik]

Hello

Please review this change for JDK-8250876

This changeset adds support for macos/aarch64 into build system.
It will allow to crosscompile for macos/aarch64 using intel mac as well.

This changeset does NOT address some arm specific issues in the macos related code, we plan to do that in s separate commit.

An example of configure to cross-compile for macos/arm64:

--with-boot-jdk=/path/to/java/ --with-build-jdk=/path/to/same/java/as/compiled  --disable-warnings-as-errors --with-jvm-variants=zero --openjdk-target=aarch64-apple-darwin --with-extra-cflags='-arch arm64' --with-extra-ldflags='-arch arm64 -F/Path/To/Folder/Containing/JNF_framework/' —with-extra-cxxflags='-arch arm64’

JNF.framework is missing arm64 part as of next macos release, but Apple has opensourced it. 

Fix to adlc were needed due to it using symbols from stdc++ and not linking to it, so it fails when doing make images.

The webrev: http://cr.openjdk.java.net/~vkempik/8250876/webrev.00/
The bug: https://bugs.openjdk.java.net/browse/JDK-8250876

Testing: jdk/submit.

Thanks, Vladimir.