tools include UAPI: Synchronize linux/fcntl.h with the kernel sources

To pick up the changes in:

  6fd73538 ("mm/memfd: add F_SEAL_EXEC")

That doesn't add or change any perf tools functionality, only addresses
these build warnings:

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

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