Fix formatting regression introduced by r174307.

In preprocessor definitions, we would not parse all the tokens and thus
not annotate them anymore. This led to a wrong formatting of comments
in google style:

  #endif // HEADER_GUARD  -- requires two spaces

llvm-svn: 174361

clang/lib/Format/TokenAnnotator.cpp

@@ -423,6 +423,8 @@ public:
     default:
       break;
     }
+    while (CurrentToken != NULL)
+      next();
   }
 
   LineType parseLine() {

clang/unittests/Format/FormatTest.cpp

@@ -479,6 +479,8 @@ TEST_F(FormatTest, UnderstandsSingleLineComments) {
 
   verifyFormat("someFunction(anotherFunction( // Force break.\n"
                "    parameter));");
+
+  verifyGoogleFormat("#endif  // HEADER_GUARD");
 }
 
 TEST_F(FormatTest, UnderstandsMultiLineComments) {