Support compiling zlib-rs

[bjorn3]

https://github.com/memorysafety/zlib-rs

Missing intrinsics:

• llvm.x86.sse42.crc32.32.32 (add the llvm.x86.sse42.crc32.32.32 intrinsic #1488)
• llvm.x86.avx2.permd (add llvm.x86.avx2.permd intrinsic #1491)