[C++] Rewrite of the preprocessor.

This rewrite fixes a couple of issues with the pre-processor. It now
supports:
- macros in macro bodies
- stringification of parameters [cpp.stringize]
- the concatenation operator [cpp.concat]
- #include MACRO_HERE
- defined() inside macro bodies used in pp-conditions.

Change-Id: Ifdb78041fb6afadf44f939a4bd66ce2832b8601f
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

src/plugins/cppeditor/cppinsertdecldef.cpp

@@ -64,7 +64,7 @@ namespace {
 class InsertDeclOperation: public CppQuickFixOperation
 {
 public:
-    InsertDeclOperation(const QSharedPointer<const Internal::CppQuickFixAssistInterface> &interface,
+    InsertDeclOperation(const QSharedPointer<const CppEditor::Internal::CppQuickFixAssistInterface> &interface,
                         const QString &targetFileName, const Class *targetSymbol,
                         InsertionPointLocator::AccessSpec xsSpec,
                         const QString &decl)
@@ -229,7 +229,7 @@ namespace {
 class InsertDefOperation: public CppQuickFixOperation
 {
 public:
-    InsertDefOperation(const QSharedPointer<const Internal::CppQuickFixAssistInterface> &interface,
+    InsertDefOperation(const QSharedPointer<const CppEditor::Internal::CppQuickFixAssistInterface> &interface,
                        Declaration *decl, const InsertionLocation &loc)
         : CppQuickFixOperation(interface, 0)
         , m_decl(decl)