rcc: fix build failure on Windows XP / MinGW 4.9

The code makes usage of _fileno without including the appropriate
header, which is stdio.h according to Microsoft:

http://msdn.microsoft.com/en-us/library/zs6wbdhx%28v=vs.120%29.aspx

Task-number: QTBUG-43900
Change-Id: Ic9d407c66243d64823353a1c7e79cf0825c735db
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>

src/tools/rcc/main.cpp

@@ -47,6 +47,7 @@
 #ifdef Q_OS_WIN
 #  include <fcntl.h>
 #  include <io.h>
+#  include <stdio.h>
 #endif // Q_OS_WIN
 
 QT_BEGIN_NAMESPACE