tracing/events: add trace-events-sample

This patch adds a sample to the samples directory on how to create
and use TRACE_EVENT trace points.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/samples/trace_events/Makefile b/samples/trace_events/Makefile
new file mode 100644
index 0000000..06c6dea
--- /dev/null
+++ b/samples/trace_events/Makefile
@@ -0,0 +1,8 @@
+# builds the trace events example kernel modules;
+# then to use one (as root):  insmod <module_name.ko>
+
+PWD := $(shell pwd)
+
+CFLAGS_trace-events-sample.o := -I$(PWD)/samples/trace_events/
+
+obj-$(CONFIG_SAMPLE_TRACE_EVENTS) += trace-events-sample.o