[jdk8u-dev] RFR: 8298527: Cygwin's uname -m returns different string than before

[SendaoYan]

Hi all,

This pull request contains a backport of [JDK-8298527](https://bugs.openjdk.org/browse/JDK-8298527), commit [1da982b4](https://github.com/openjdk/jdk17u-dev/commit/1da982b4f4653002177b1bb2deee7688f2600c05) from the [openjdk/jdk17u-dev](https://git.openjdk.org/jdk17u-dev) repository.
I had to resolve because RISCV64 was not handled in jdk8u-dev yet. 

The commit being backported was authored by Christoph Langer on 22 Dec 2022 and was reviewed by Matthias Baesken.

This backport not clean bacause of file `common/autoconf/build-aux/config.guess` was move to `make/autoconf/build-aux/config.guess`

Thanks!

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Commit messages:
 - Backport ca49dbf39916e4d68e81e139a14d922f6144e8ee

Changes: https://git.openjdk.org/jdk8u-dev/pull/499/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=499&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298527
  Stats: 53 lines in 1 file changed: 33 ins; 19 del; 1 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/499.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/499/head:pull/499

PR: https://git.openjdk.org/jdk8u-dev/pull/499