Run clang-format on torch/csrc/distributed/c10d

Summary: Pull Request resolved: pytorch#18255

Differential Revision: D14563072

Pulled By: pietern

fbshipit-source-id: bd83f90ae949b14bc95f4009ba12319c9b7936d0

Author: pietern

torch/csrc/distributed/c10d/ddp.cpp

@@ -9,8 +9,8 @@
 
 #include <ATen/ATen.h>
 #include <ATen/cuda/CUDAEvent.h>
-#include <c10/cuda/CUDAGuard.h>
 #include <ATen/cuda/CUDAMultiStreamGuard.h>
+#include <c10/cuda/CUDAGuard.h>
 
 #include <cstddef>
 #include <memory>