QT_NO_PROCESS for WinRT

As Windows Runtime does not really support the use
of spawning processes QT_NO_PROCESS is defined for
winrt builds and the corresponding sources are
excluded from build.

Change-Id: I79263417c985b23678c55ac44a5591a9a69d3c13
Reviewed-by: Andrew Knight <andrew.knight@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

src/corelib/global/qglobal.h

@@ -540,6 +540,10 @@ class QDataStream;
 #  define QT_NO_SYSTEMSEMAPHORE  // not needed at all in a flat address space
 #endif
 
+#if defined(Q_OS_WINRT)
+#  define QT_NO_PROCESS
+#endif
+
 inline void qt_noop(void) {}
 
 /* These wrap try/catch so we can switch off exceptions later.

src/corelib/io/io.pri

@@ -95,22 +95,25 @@ win32 {
 
         SOURCES += io/qfilesystemwatcher_win.cpp
         HEADERS += io/qfilesystemwatcher_win_p.h
-        HEADERS += io/qwindowspipewriter_p.h
-        SOURCES += io/qwindowspipewriter.cpp
         SOURCES += io/qfilesystemengine_win.cpp
         SOURCES += io/qfilesystemiterator_win.cpp
         SOURCES += io/qstandardpaths_win.cpp
 
-    wince* {
-        SOURCES += io/qprocess_wince.cpp
-    } else {
-        HEADERS += \
-            io/qwinoverlappedionotifier_p.h \
-            io/qwindowspipereader_p.h
-        SOURCES += \
-            io/qprocess_win.cpp \
-            io/qwinoverlappedionotifier.cpp \
-            io/qwindowspipereader.cpp
+    !winrt {
+        HEADERS += io/qwindowspipewriter_p.h
+        SOURCES += io/qwindowspipewriter.cpp
+
+        wince* {
+            SOURCES += io/qprocess_wince.cpp
+        } else {
+            HEADERS += \
+                io/qwinoverlappedionotifier_p.h \
+                io/qwindowspipereader_p.h
+            SOURCES += \
+                io/qprocess_win.cpp \
+                io/qwinoverlappedionotifier.cpp \
+                io/qwindowspipereader.cpp
+        }
     }
 } else:unix|integrity {
         SOURCES += \