libipt: use the block cache
libipt: use the block cache

Use the block cache to speed up block decode for the no-event flow.  This is
typically the most heavily used flow.

The cache can be used for ip-based event flows but this requires a little bit
more work and is much less effective.

Change-Id: I28d3f2e45802dd8e17ad57119f88794474a0ebbd
Signed-off-by: Markus Metzger <5f675b2b36595f90898e014b548ff7d9bbff2ab7@intel.com>

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