RFR: 8254072: AArch64: Get rid of --disable-warnings-as-errors on Windows+ARM64 build [v4]

[Bernhard Urban-Forster]

On Mon, 2 Nov 2020 17:43:31 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> https://github.com/openjdk/jdk/pull/1013
>
>> @lewurm
>> This patch seems to break on linux-aarch64 with gcc:
> 
> Builds cleanly on Linux/GCC or me.

@theRealAph what gcc version?

I can reproduce with
$ gcc --version
gcc (Ubuntu 9.2.1-9ubuntu2) 9.2.1 20191008
which ships in Ubuntu 19.10 as default

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PR: https://git.openjdk.java.net/jdk/pull/530