[clang] [clang][ARM] Include arm_acle.h in intrin.h on supported platforms (PR #144172)

[Reid Kleckner via cfe-commits]

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

Thanks, looks good to me.

Sorry for the delay, I've had various conferences. In general, it makes me think we need to grow more maintainers and delegate more approval power. That's clearly a long-term project, but any one maintainer can only be so available. :)

https://github.com/llvm/llvm-project/pull/144172