C++: Fix highlighting for lines with predefined macros

This adds definitions for the macros __FILE__, __LINE__, __DATE__ and
__TIME__ on demand.

As a side effect, this also introduces highlighting for the uses of
these macros.

Task-number: QTCREATORBUG-8036
Change-Id: Ib7546c7d45d2eecbc50c7883fc684e3497154405
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

tests/auto/cplusplus/preprocessor/tst_preprocessor.cpp

@@ -796,7 +796,11 @@ void tst_Preprocessor::builtin__FILE__()
                            ));
     const QByteArray result____ =
             "# 1 \"some-file.c\"\n"
-            "const char *f = \"some-file.c\"\n";
+            "const char *f =\n"
+            "# expansion begin 16,8 ~1\n"
+            "\"some-file.c\"\n"
+            "# expansion end\n"
+            "# 2 \"some-file.c\"\n";
 
     QCOMPARE(preprocessed, result____);
 }