[clang] [flang] [flang][Driver] Enable -pie and -no-pie in flang's driver (PR #164890)

[Tarun Prabhu via cfe-commits]

tarunprabhu wrote:

> The test passed on Both AIX and LoP. Thanks.

Thanks for checking Daniel. And apologies for not responding to your first question about the patch not applying. I got tangled up with other things.

https://github.com/llvm/llvm-project/pull/164890