[compiler-rt] [AIX][PGO] Handle atexit functions when dlclose'ing shared libraries (PR #102940)

[Wael Yehia via llvm-commits]

w2yehia wrote:

@rorth thanks for the pointer, I wasn't aware of that resource. Just to double, https://gcc.gnu.org/wiki/CompileFarm is what you're referring to?

https://github.com/llvm/llvm-project/pull/102940