tools headers UAPI: Sync linux/sched.h with the kernel

to #30401861

commit c27de2b upstream

To pick up the change in:

  b3e5838 ("clone: add CLONE_PIDFD")

This requires changes in the 'perf trace' beautification routines for
the 'clone' syscall args, which is done in a followup patch.

This silences the following perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/sched.h' differs from latest version at 'include/uapi/linux/sched.h'
  diff -u tools/include/uapi/linux/sched.h include/uapi/linux/sched.h

Cc: Adrian Hunter <[email protected]>
Cc: Brendan Gregg <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Luis Cláudio Gonçalves <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: https://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Yang, Wei <[email protected]>
Reviewed-by: Xunlei Pang <[email protected]>

tools/include/uapi/linux/sched.h

@@ -10,6 +10,7 @@
 #define CLONE_FS	0x00000200	/* set if fs info shared between processes */
 #define CLONE_FILES	0x00000400	/* set if open files shared between processes */
 #define CLONE_SIGHAND	0x00000800	/* set if signal handlers and blocked signals shared */
+#define CLONE_PIDFD	0x00001000	/* set if a pidfd should be placed in parent */
 #define CLONE_PTRACE	0x00002000	/* set if we want to let tracing continue on the child too */
 #define CLONE_VFORK	0x00004000	/* set if the parent wants the child to wake it up on mm_release */
 #define CLONE_PARENT	0x00008000	/* set if we want to have the same parent as the cloner */