Integrate LLVM at llvm/llvm-project@ecaff13fc0bc
Integrate LLVM at llvm/llvm-project@ecaff13fc0bc

Updates LLVM usage to match
[ecaff13fc0bc](https://github.com/llvm/llvm-project/commit/ecaff13fc0bc)

PiperOrigin-RevId: 346083459

iree-org/iree,iree-org/iree,google/iree,iree-org/iree,iree-org/iree,google/iree,google/iree,iree-org/iree,iree-org/iree,google/iree,google/iree,google/iree,iree-org/iree,google/iree