copy address of proc_ns_ops into ns_common

fs/namespace.c

fs/proc/inode.c

include/linux/ns_common.h

init/version.c

ipc/msgutil.c

ipc/namespace.c

kernel/nsproxy.c

kernel/pid.c

kernel/pid_namespace.c

kernel/user.c

kernel/user_namespace.c

kernel/utsname.c

net/core/net_namespace.c