remove visual studio specific argument

"-ServerName:" is only used for Visual Studio and causes bad side-
effects when using QCommandLineParser.

Change-Id: Ifef652bbb65df9279a39ae3c74ddbb563c87bd90
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Andrew Knight <andrew.knight@intopalo.com>
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>

src/winmain/qtmain_winrt.cpp

@@ -243,6 +243,9 @@ private:
             }
         }
 
+        if (args.count() >= 2 && strncmp(args.at(1), "-ServerName:", 12) == 0)
+            args.remove(1);
+
         bool develMode = false;
         bool debugWait = false;
         foreach (const char *arg, args) {