[clang] [compiler-rt] [llvm] [PGO] Initialize GOV Writeout and Reset Functions in the Runtime on AIX (PR #108570)

[Qiongsi Wu via cfe-commits]

qiongsiwu wrote:

@hubert-reinterpretcast and @w2yehia could you take a look at this PR? We can land this PR if you both are OK with it. Currently, the PR only impacts AIX. Thanks so much! 

https://github.com/llvm/llvm-project/pull/108570