tools headers UAPI s390: Sync ptrace.h kernel headers

To pick up the changes from:

  56e62a73 ("s390: convert to generic entry")

That only adds two new defines, so shouldn't cause problems when
building the BPF selftests.

Silencing this perf build warning:

  Warning: Kernel ABI header at 'tools/arch/s390/include/uapi/asm/ptrace.h' differs from latest version at 'arch/s390/include/uapi/asm/ptrace.h'
  diff -u tools/arch/s390/include/uapi/asm/ptrace.h arch/s390/include/uapi/asm/ptrace.h

Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>