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

[Aleksey Shipilev]

Changeset: 85d4b491
Author:    Ludovic Henry <luhenry at openjdk.org>
Committer: Aleksey Shipilev <shade at openjdk.org>
Date:      2022-09-06 16:24:04 +0000
URL:       https://git.openjdk.org/jdk/commit/85d4b49151e9529051f1ed344749a487d3e92165

8283929: GHA: Add RISC-V build config

Reviewed-by: ihse, shade

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