[clang] [Clang] Forward -rpath flag to the correct format in CPU offloading (PR #95763)

[Joseph Huber via cfe-commits]

https://github.com/jhuber6 commented:

I thought that clang accepted `-rpath <path>`? I see that format when I try CPU offloading.

https://github.com/llvm/llvm-project/pull/95763