We don't need the fully bootable Debian installation to build against. Therefore, we can bootstrap with `--variant=minbase`. The sysroots are about 5..10% smaller then.
This would also make our builds more immune to issues like [JDK-8313701](https://bugs.openjdk.org/browse/JDK-8313701). Note that RISC-V GHAs are fixed with this PR. Additional testing: - [x] GHA cross-compilation builds ------------- Commit messages: - Fix Changes: https://git.openjdk.org/jdk/pull/15140/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15140&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8313707 Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/15140.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15140/head:pull/15140 PR: https://git.openjdk.org/jdk/pull/15140
