Header guard canonicalization, clang part.

Modifications made by clang-tidy with minor tweaks.

llvm-svn: 215557
diff --git a/clang/lib/CodeGen/SanitizerMetadata.h b/clang/lib/CodeGen/SanitizerMetadata.h
index 6d66cbe..9630668 100644
--- a/clang/lib/CodeGen/SanitizerMetadata.h
+++ b/clang/lib/CodeGen/SanitizerMetadata.h
@@ -10,8 +10,8 @@
 // Class which emits metadata consumed by sanitizer instrumentation passes.
 //
 //===----------------------------------------------------------------------===//
-#ifndef CLANG_CODEGEN_SANITIZERMETADATA_H
-#define CLANG_CODEGEN_SANITIZERMETADATA_H
+#ifndef LLVM_CLANG_LIB_CODEGEN_SANITIZERMETADATA_H
+#define LLVM_CLANG_LIB_CODEGEN_SANITIZERMETADATA_H
 
 #include "clang/Basic/LLVM.h"
 #include "clang/Basic/SourceLocation.h"