lib/platforms: rewrite
lib/platforms: rewrite

Make platform tuple strings variables, this will prevent
typos in meta.platforms.

Add architecture specific attributes for all architectures.

Defined more platforms.

TODO: add missing tuples

triton/triton,triton/triton,triton/triton,triton/triton,triton/triton,triton/triton,triton/triton,triton/triton