git: openjdk/jdk17u-dev: 8283929: GHA: Add RISC-V build config

[Vladimir Kempik]

Changeset: d5eec584
Author:    Feilong Jiang <fjiang at openjdk.org>
Committer: Vladimir Kempik <vkempik at openjdk.org>
Date:      2023-07-11 11:23:04 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/d5eec584da2bb6a43ab9df3379958b2dd6a4dd9f

8283929: GHA: Add RISC-V build config

Reviewed-by: vkempik
Backport-of: 85d4b49151e9529051f1ed344749a487d3e92165

! .github/workflows/build-cross-compile.yml