winmain: port the last remaining Q_FOREACH loop and add QT_NO_FOREACH

Port the last remaining Q_FOREACH (over a QVarLengthArray,
no less) in winmain to C++11 range-for and mark the library
as Q_FOREACH-free, using QT_NO_FOREACH.

Change-Id: Ic561080f7dd61d1d853ceb9e211c9b8a23bf05a5
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>

src/winmain/qtmain_winrt.cpp

@@ -298,7 +298,7 @@ private:
 
         bool develMode = false;
         bool debugWait = false;
-        foreach (const char *arg, args) {
+        for (const char *arg : args) {
             if (strcmp(arg, "-qdevel") == 0)
                 develMode = true;
             if (strcmp(arg, "-qdebug") == 0)

src/winmain/winmain.pro

@@ -8,6 +8,8 @@ DESTDIR = $$QT.core.libs
 CONFIG += static
 QT = core
 
+DEFINES += QT_NO_FOREACH
+
 contains(QT_CONFIG, build_all):CONFIG += build_all
 
 win32-msvc*:QMAKE_CFLAGS_DEBUG -= -Zi