perf json: Add s390 transaction counter definition

'perf stat' displays transactional counters using flag -T on x86. On
s390 use a JSON file defined metric named transaction to achieve the
same result.

Output before:

none

Output after:

[root@s35lp76 perf]# ./perf stat -M transaction -- \
~/mytesttx 1 >/tmp/111

Performance counter stats for '/root/mytesttx 1':

1 tx_c_tend # 13.0 transaction
1 tx_nc_tend
11 tx_nc_tabort
0 tx_c_tabort_special
0 tx_c_tabort_no_special

0.001061232 seconds time elapsed

[root@s35lp76 perf]#

Suggested-by: Andi Kleen <[e-mail]>
Signed-off-by: Thomas Richter <[e-mail]>
Reviewed-by: Hendrik Brueckner <[e-mail]>
Cc: Heiko Carstens <[e-mail]>
Cc: Martin Schwidefsky <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/pmu-events/arch/s390/cf_z13/transaction.json

···
+[
+  {
+    "BriefDescription": "Transaction count",
+    "MetricName": "transaction",
+    "MetricExpr": "TX_C_TEND + TX_NC_TEND + TX_NC_TABORT + TX_C_TABORT_SPECIAL + TX_C_TABORT_NO_SPECIAL"
+  }
+]

tools/perf/pmu-events/arch/s390/cf_z14/transaction.json

···
+[
+  {
+    "BriefDescription": "Transaction count",
+    "MetricName": "transaction",
+    "MetricExpr": "TX_C_TEND + TX_NC_TEND + TX_NC_TABORT + TX_C_TABORT_SPECIAL + TX_C_TABORT_NO_SPECIAL"
+  }
+]

tools/perf/pmu-events/arch/s390/cf_zec12/transaction.json

···
+[
+  {
+    "BriefDescription": "Transaction count",
+    "MetricName": "transaction",
+    "MetricExpr": "TX_C_TEND + TX_NC_TEND + TX_NC_TABORT + TX_C_TABORT_SPECIAL + TX_C_TABORT_NO_SPECIAL"
+  }
+]