libipt: improve error reporting

Add a few new error codes to provide more detailed error descriptions:

  pte_retstack_empty
  pte_bad_retcomp
  pte_bad_status_update
  pte_no_enable
  pte_event_ignored

Change-Id: I5ddede51e5963269633b4bdad78c71e3ec35d9d5
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
6 files changed