Add support for s390 auxiliary trace support.

Use 'perf record -e rbd000 -- ls' to create the perf.data file.

Use 'perf report' to display the auxiliary trace data.

Output before:

  [root@s35lp76 perf]# ./perf report --stdio
  0x128 [0x10]: failed to process type: 70
  Error:
  failed to process sample
  [root@s35lp76 perf]#

Output after:

  [root@s35lp76 perf]# ./perf report --stdio

      18.21%    18.21%  ls     [kernel.kallsyms]       [k] ftrace_likely_update
       9.52%     9.52%  ls     [kernel.kallsyms]       [k] lock_acquire
       9.38%     9.38%  ls     [kernel.kallsyms]       [k] lock_release
       3.45%     3.45%  ls     [kernel.kallsyms]       [k] lock_acquired
       2.88%     2.88%  ls     [kernel.kallsyms]       [k] link_path_walk
       2.63%     2.63%  ls     [kernel.kallsyms]       [k] __d_lookup
       2.38%     2.38%  ls     [kernel.kallsyms]       [k] __d_lookup_rcu
       2.04%     2.04%  ls     [kernel.kallsyms]       [k] ___might_sleep
       1.83%     1.83%  ls     [kernel.kallsyms]       [k] debug_lockdep_rcu_enabled
       1.44%     1.44%  ls     [kernel.kallsyms]       [k] dput
     ....
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20180802074622.13641-4-tmricht@linux.ibm.com
[ Use PRI[xd]64 to fix the build on debian:experimental-x-mips (gcc 8.1.0) and others ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>