[llvm] [ARM] Generate build-attributes more correctly in the presence of intrinsic declarations. (PR #160749)

[Peter Smith via llvm-commits]

https://github.com/smithp35 approved this pull request.

LGTM. I agree that we should skip over declarations when considering the build attributes for this module. The module defining the declared functions will define its build attributes.

https://github.com/llvm/llvm-project/pull/160749