tools lib traceevent: Add support to show migrate disable counter

The RT kernel added a migrate disable counter in all events. Add
support to show this in the latency format.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-l6ulxyda952g7kua4pfsh73k@git.kernel.org


Signed-off-by: Namhyung Kim <namhyung@kernel.org>