selftests: ftrace: Have event tests also run in an tracing instance

The ftrace selftests of events: event-enable, event-pid, and
subsystem-enable can all be run inside an instance. Change their tests to do
both a toplevel run an an instance run.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
diff --git a/tools/testing/selftests/ftrace/test.d/event/event-enable.tc b/tools/testing/selftests/ftrace/test.d/event/event-enable.itc
similarity index 100%
rename from tools/testing/selftests/ftrace/test.d/event/event-enable.tc
rename to tools/testing/selftests/ftrace/test.d/event/event-enable.itc
diff --git a/tools/testing/selftests/ftrace/test.d/event/event-pid.tc b/tools/testing/selftests/ftrace/test.d/event/event-pid.itc
similarity index 100%
rename from tools/testing/selftests/ftrace/test.d/event/event-pid.tc
rename to tools/testing/selftests/ftrace/test.d/event/event-pid.itc
diff --git a/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc b/tools/testing/selftests/ftrace/test.d/event/subsystem-enable.itc
similarity index 100%
rename from tools/testing/selftests/ftrace/test.d/event/subsystem-enable.tc
rename to tools/testing/selftests/ftrace/test.d/event/subsystem-enable.itc