ptdump: allow specifying an offset/range for the PT file
ptdump: allow specifying an offset/range for the PT file

This aligns behavior and implementation to ptxed.

Change-Id: I9e72c4cbc0cf2df2aafde67724006ffa2eb352db
Signed-off-by: Thilo Schmitt <62d68cbd24b29d71abbfd77b3c17fc8953e86a7a@intel.com>

pombreda/processor-trace,01org/processor-trace,01org/processor-trace,drupalhunter-team/processor-trace,andikleen/processor-trace,drupalhunter-team/processor-trace,shadown/processor-trace,hoangt/processor-trace,breadbaconic/processor-trace,breadbaconic/processor-trace,andikleen/processor-trace,01org/processor-trace,hoangt/processor-trace,pombreda/processor-trace,shadown/processor-trace