Disable conforming bit on USER32_CS segment

No difference, but it's more consistent.  Pointed out by Petr Vandrovec and
some VMWare people
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>