README: mention test, include, and capture-howto
README: mention test, include, and capture-howto

Change-Id: I1e4be58ab8fb0ea1de81e9105982eb8a1c62b09c
Signed-off-by: Markus Metzger <5f675b2b36595f90898e014b548ff7d9bbff2ab7@intel.com>

01org/processor-trace,01org/processor-trace,01org/processor-trace