tools include UAPI: Sync linux/mount.h copy with the kernel sources

To pick the changes from:

  35e27a57 ("fs: keep struct mnt_id_req extensible")
  b4c2bea8 ("add listmount(2) syscall")
  46eae99e ("add statmount(2) syscall")

That doesn't change anything in tools this time as nothing that is
harvested by the beauty scripts got changed:

  $ ls -1 tools/perf/trace/beauty/*mount*sh
  tools/perf/trace/beauty/fsmount.sh
  tools/perf/trace/beauty/mount_flags.sh
  tools/perf/trace/beauty/move_mount_flags.sh
  $

This addresses this perf build warning.

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/linux/mount.h include/uapi/linux/mount.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/ZbkMiB7ZcOsLP2V5@kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>