code cleanups, and no longer forcing unpinned ibt instructions into the placement queue.  we should put them in on demand if we find they aren't being placed.

Fixed several fields that were being left blank in header, as well as adding code to pad sections so that there is no gap betwee them.  this seems to be required by pe files.

code cleanups, updates to arm patcher to support tramoplining short-immediate instructions to out-of-band locations

Add padding sections to a zipr'd program where
the gap between two existing sections is greater
than a certain minimum boundary.