[Enhancements] recognize LoongArch architectures

[stephengold]

Please add to the NativeVariant.Cpu class:

public static boolean isLoongArch() {
        return OS_ARCH.getProperty().contains("loong");
}

and to the PlatformPredicate class:

public static final PlatformPredicate LINUX_LOONGARCH_64 = new PlatformPredicate(NativeVariant.Os.isDesktop() &&
        NativeVariant.Os.isLinux() && NativeVariant.Cpu.isLoongArch() && NativeVariant.Cpu.is64());

[pavly-gerges]

Hello, I've no idea why I haven't got any notification for this. Thanks for reporting! Let me know if there are anything required for the next release. Would you like this to appear in a patch release or a minor release?

[stephengold]

It seems worthy of a minor release.

[pavly-gerges]

This may require testing to satisfy your needs. Would you like to take it over?

[stephengold]

No, not really.