Add initial support for testing sparc64

[nathanchance]

This is now supported in tuxmake 1.28.4 and boot-utils.

Closes: #786

[stylesen]

@nathanchance I tried running a build with target arch sparc with toolchain clang-nightly and looks like the builds are failing. I used the following command:

tuxsuite build --git-repo https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git --git-ref master --target-arch sparc --kconfig sparc64_defconfig --kernel-image image --toolchain clang-nightly kernel LLVM_IAS=0

and here is the build that failed - https://tuxapi.tuxsuite.com/v1/groups/tuxsuite/projects/senthil/builds/2p7PI8BD0clh5lasnq4BEqFPJF9

Am I missing any parameters here? I can see it is related to --target= as discussed in https://lore.kernel.org/lkml/20230419192446.GA1993276@dev-arch.thelio-3990X/T/

[nickdesaulniers]

@stylesen The git repo you're trying to build, stable, does not yet have the necessary patches. linux-next does. Try building that instead. git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

[nickdesaulniers]

Never thought I'd see the day... 🤯 🍸

[stylesen]

@stylesen The git repo you're trying to build, stable, does not yet have the necessary patches. linux-next does. Try building that instead. git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

Yes that worked - https://tuxapi.tuxsuite.com/v1/groups/tuxsuite/projects/senthil/builds/2p7jwV8ZdlwI676YlBUShqG8Vhk

Thanks for explaining @nathanchance