Add loong64 to cross-platform linux builds

[headius]

See #126

[headius]

@Panxuefeng-loongson I have tried a dozen different combinations of Docker image and JDK and can't find a combination that will let me build jffi. Can you help?

[Panxuefeng-loongson]

@Panxuefeng-loongson I have tried a dozen different combinations of Docker image and JDK and can't find a combination that will let me build jffi. Can you help?

I'll try it on my machine to see if there is a suitable combination. If I get any updates, I'll let you know right away.

[Panxuefeng-loongson]

@Panxuefeng-loongson I have tried a dozen different combinations of Docker image and JDK and can't find a combination that will let me build jffi. Can you help?

Docker image: lcr.loongnix.cn/library/debian:unstable

JDK binary:
https://ftp.loongnix.cn/Java/openjdk8/loongson8.1.26-fx-jdk8u482b08-linux-loongarch64-glibc2.34.tar.gz

I tested this combination and was able to successfully build jffi.

[headius]

@Panxuefeng-loongson Thanks for the help. Latest push has the correct Debian image installing but can't update any package lists. I'll have to make a separate workflow to just fetch the JDK to use.

[Panxuefeng-loongson]

Please let us know if you run into any more trouble, and we’ll get it sorted right away.

[headius]

I'll revisit this soon, thank you for the help! It would be good if you can arrange a Debian package repository in the future because that would make the JDK part of this much easier to work with.

[Panxuefeng-loongson]

Sounds good. I'll check and verify how to resolve this issue over the next couple of days.