[llvm] [MC] Set SHF_EXCLUDE for AArch64 (and other) build attributes sections (PR #125824)

[Peter Smith via llvm-commits]

smithp35 wrote:

I've posted https://github.com/llvm/llvm-project/pull/125838 to discard .ARM.attributes sections in LLD. This will be the right thing to do for all but relocatable links so it can be built upon by @sivan-shani , who is working on full support in LLD right now.

https://github.com/llvm/llvm-project/pull/125824