Permit TODO comments in Google C++ style

Google's C++ Code Guide requires the author's username in TODO comments:

  // TODO(hasselmm): Fix this mess

Change-Id: Ic003c7a1bf22e43a0882284f07017fb25d031c21
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

src/plugins/todo/lineparser.cpp

@@ -58,7 +58,8 @@ bool LineParser::isKeywordSeparator(const QChar &ch)
     return ch.isSpace()
         || (ch == QLatin1Char(':'))
         || (ch == QLatin1Char('/'))
-        || (ch == QLatin1Char('*'));
+        || (ch == QLatin1Char('*'))
+        || (ch == QLatin1Char('('));
 }
 
 LineParser::KeywordEntryCandidates LineParser::findKeywordEntryCandidates(const QString &line)