MAINTAINERS: Add some more pattern to recognize all win32 related files

The get_maintainer.pl script currently thinks that the win32
related files in the util and include folders are currently
unmaintained. Thus let's add some additional wildcards to
match these files.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

MAINTAINERS

@@ -322,6 +322,9 @@ L: qemu-devel@nongnu.org
 M: Stefan Weil <sw@weilnetz.de>
 S: Maintained
 F: *win32*
+F: */*win32*
+F: include/*/*win32*
+X: qga/*win32*
 F: qemu.nsi
 
 ARM Machines