Header guard canonicalization, clang part.

Modifications made by clang-tidy with minor tweaks.

llvm-svn: 215557
diff --git a/clang/lib/StaticAnalyzer/Checkers/InterCheckerAPI.h b/clang/lib/StaticAnalyzer/Checkers/InterCheckerAPI.h
index e35557f..b7549fd 100644
--- a/clang/lib/StaticAnalyzer/Checkers/InterCheckerAPI.h
+++ b/clang/lib/StaticAnalyzer/Checkers/InterCheckerAPI.h
@@ -10,8 +10,8 @@
 // inter-checker communications.
 //===----------------------------------------------------------------------===//
 
-#ifndef INTERCHECKERAPI_H_
-#define INTERCHECKERAPI_H_
+#ifndef LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_INTERCHECKERAPI_H
+#define LLVM_CLANG_LIB_STATICANALYZER_CHECKERS_INTERCHECKERAPI_H
 namespace clang {
 namespace ento {