[llvm] [LLVM] add LZMA for compression/decompression (PR #83297)

[Fangrui Song via llvm-commits]

MaskRay wrote:

I am also curious to see justifications for adding lzma. The compression ratio is better but compression/decompression is extremely slow. In addition, lzma is not good at compressing binary data.
 
I had surveyed multiple compression implementations when I added zstd to llvm: https://groups.google.com/g/generic-abi/c/satyPkuMisk
which may be useful

https://github.com/llvm/llvm-project/pull/83297