[DTLTO][LLVM] clang format LTO.h to prevent automated checks errors

Some of the code in LTO.h did not conform to the LLVM coding standard.
However, it did match the style already used in that file.

However this was causing automated code-formatting checks from Github to
fail which was confusing on the PR. I decided to apply clang-format
everywhere to prevent this - even though the new code no longer matches
the style of the existing.

Author: bd1976bris

llvm/include/llvm/LTO/LTO.h

@@ -318,14 +318,11 @@ ThinBackend createInProcessThinBackend(ThreadPoolStrategy Parallelism,
 /// jobs execution.
 /// SaveTemps is a debugging tool that prevents temporary files created by this
 /// backend from being cleaned up.
-ThinBackend createOutOfProcessThinBackend(ThreadPoolStrategy Parallelism,
-                                          IndexWriteCallback OnWrite,
-                                          bool ShouldEmitIndexFiles,
-                                          bool ShouldEmitImportsFiles,
-                                          StringRef LinkerOutputFile,
-                                          StringRef RemoteOptTool,
-                                          StringRef Distributor,
-                                          bool SaveTemps);
+ThinBackend createOutOfProcessThinBackend(
+    ThreadPoolStrategy Parallelism, IndexWriteCallback OnWrite,
+    bool ShouldEmitIndexFiles, bool ShouldEmitImportsFiles,
+    StringRef LinkerOutputFile, StringRef RemoteOptTool, StringRef Distributor,
+    bool SaveTemps);
 
 /// This ThinBackend writes individual module indexes to files, instead of
 /// running the individual backend jobs. This backend is for distributed builds