namespace: move definition of CLONE_SUBNS

The CRIU internal define of CLONE_SUBNS should not be put in
syscall-types.h since this define is not part of a system call.

This move is required to prepare the removal of syscall.h from the
component of crtools binary.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Reviewed-by: Christopher Covington <cov@codeaurora.org>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

include/namespaces.h

@@ -4,6 +4,9 @@
 #include "compiler.h"
 #include "files.h"
 
+/* Nested namespaces are supported only for these types */
+#define CLONE_SUBNS	(CLONE_NEWNS)
+
 struct ns_desc {
 	unsigned int	cflag;
 	char		*str;

include/syscall-types.h

@@ -67,9 +67,6 @@ struct itimerspec;
 
 #define CLONE_ALLNS	(CLONE_NEWPID | CLONE_NEWNET | CLONE_NEWIPC | CLONE_NEWUTS | CLONE_NEWNS | CLONE_NEWUSER)
 
-/* Nested namespaces are supported only for these types */
-#define CLONE_SUBNS	(CLONE_NEWNS)
-
 #define setns	sys_setns
 
 struct rlimit;