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

[Yaxun Liu via llvm-commits]

yxsamliu wrote:

> Thanks for doing this @yxsamliu ! Does `-DLLVM_ENABLE_LZMA=ON` work on Windows too?

I was able to build libzlma with https://github.com/tukaani-project/xz on Windows with VS 2022. LLVM cmake config is able to find its include file but not the library with -DLIBLZMA_ROOT. I am still investigating.

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