props: add RustChain vintage PowerPC tower#29

Asti1982 wants to merge 1 commit into

Scottcjn:mainScottcjn/xonotic-rustchain:mainfrom

Asti1982:codex/rustchain-vintage-powerpc-propAsti1982/xonotic-rustchain:codex/rustchain-vintage-powerpc-propCopy head branch name to clipboard