[clang] [Driver] Add linker options to support statical linking to shared flang-rt on AIX. (PR #131822)

[Daniel Chen via cfe-commits]

DanielCChen wrote:

Note that the reason `aio.exp` is not needed is because flang-rt currently doesn't do asynchronous I/O. Once it is enabled using POSIX `aio_*` system calls, it will need to export those calls. 

https://github.com/llvm/llvm-project/pull/131822