Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/PassRegistry.h b/linux-x64/clang/include/llvm/PassRegistry.h
index 93edc12..5746213 100644
--- a/linux-x64/clang/include/llvm/PassRegistry.h
+++ b/linux-x64/clang/include/llvm/PassRegistry.h
@@ -9,7 +9,7 @@
 //
 // This file defines PassRegistry, a class that is used in the initialization
 // and registration of passes.  At application startup, passes are registered
-// with the PassRegistry, which is later provided to the PassManager for 
+// with the PassRegistry, which is later provided to the PassManager for
 // dependency resolution and similar tasks.
 //
 //===----------------------------------------------------------------------===//