libipt: add back link from section to test fixture in ptunit-image
libipt: add back link from section to test fixture in ptunit-image

Add a link to the test fixture containing the section in struct ifix_status.
This link can be used to add further sections when cloning a test section.

Change-Id: I9f610b87c3995c57e41df4e44d88422f0b44921f
Signed-off-by: Markus Metzger <5f675b2b36595f90898e014b548ff7d9bbff2ab7@intel.com>

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