[llvm] [AIX]export function descriptor symbols related to template functions. (PR #101920)

[Hubert Tong via llvm-commits]

https://github.com/hubert-reinterpretcast commented:

This does not seem right to me: I think the intent is _not_ to ignore the template-related behaviour for AIX function descriptors, but to base the determination on whether they are referenced on whether the function descriptor _or_ the entry point is referenced.

https://github.com/llvm/llvm-project/pull/101920