tracing: tracepoints, samples

Tracepoint example code under samples/.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Acked-by: 'Peter Zijlstra' <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --cc samples/Kconfig
Simple merge

diff --cc samples/Makefile
Simple merge

diff --cc samples/tracepoints/Makefile
Simple merge

diff --cc samples/tracepoints/tp-samples-trace.h
Simple merge

diff --cc samples/tracepoints/tracepoint-probe-sample.c
Simple merge

diff --cc samples/tracepoints/tracepoint-probe-sample2.c
Simple merge

diff --cc samples/tracepoints/tracepoint-sample.c
Simple merge