[PATCH] uml: remove warnings added by previous -stable patch

Add needed includes for syscall() function, also to remove warnings spit out by
GCC; they were added by previous -stable patch, and at least on my system
(Ubuntu x86-64) these warnings do show up.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

arch/um/os-Linux/sys-i386/tls.c

 #include <errno.h>
+#include <sys/syscall.h>
+#include <unistd.h>
 #include <linux/unistd.h>
 #include "sysdep/tls.h"
 #include "user_util.h"

arch/um/os-Linux/tls.c

 #include <errno.h>
 #include <sys/ptrace.h>
+#include <sys/syscall.h>
 #include <asm/ldt.h>
+#include <unistd.h>
 #include "sysdep/tls.h"
 #include "uml-config.h"