[llvm] [MC][BPF] Avoid generating .note.GNU-stack section (PR #159960)

[Fangrui Song via llvm-commits]

https://github.com/MaskRay approved this pull request.

Alternatively, change MCAsmInfoELF::getNonexecutableStackSection . It already has a Ctx.getTargetTriple().isOSSolaris() check.

https://github.com/llvm/llvm-project/pull/159960