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.

fixed eh-frame-start-addr output to decimal, instead of it coming out as sometimes hex and decimal, which confused the assembler what we meant

naive solution

See merge request allzp/zipr!18