[jdk20] RFR: 8298527: Cygwin's uname -m returns different string than before

[Erik Joelsson]

On Sun, 11 Dec 2022 14:13:14 GMT, Christoph Langer <clanger at openjdk.org> wrote:

> `uname -m` returns `.x86_64` after the latest upgread, instead of `x86_64`. Not sure why.
> 
> However, we can handle this in autoconf-config.guess, to unbreak the build.

We don't change the autoconf-* files in build-aux directly. Instead we modify the wrapper scripts.

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PR: https://git.openjdk.org/jdk20/pull/15