Add 4 more cases for Intel PT.

1. Add Intel PT sanpshot mode test.
2. Add Intel PT exclude user trace mode test.
3. Add Intel PT exclude kernel trace mode test.
4. Add Intel PT disable branch trace mode test.

---
 runtest/tracing                            |  4 ++
 testcases/kernel/tracing/pt_test/pt_test.c | 67 ++++++++++++++++++++++++------
 2 files changed, 58 insertions(+), 13 deletions(-)

index 504132d70..d2700ca57 100644
@@ -4,3 +4,7 @@ ftrace_regression02	ftrace_regression02.sh
 ftrace-stress-test	ftrace_stress_test.sh 90
 dynamic_debug01		dynamic_debug01.sh
 pt_full_trace_basic pt_test
+pt_snapshot_trace_basic pt_test -m
+pt_ex_user pt_test -e user
+pt_ex_kernel pt_test -e kernel
+pt_disable_branch pt_test -b

2.14.1

Hi Ammy,

Merged with tiny formatting changes.
Thanks for your patch!

Kind regards,
Petr