perf tools: Update mmap2 interface with protection and flag bits

The kernel piece passes more info now.  Update the perf tool to reflect
that and adjust the synthesized maps to play along.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1400526833-141779-4-git-send-email-dzickus@redhat.com


Signed-off-by: Jiri Olsa <jolsa@kernel.org>