Ensure version info is present in core dumps

[wesgarland]

Describe your feature request here.

I'd like to be able to inspect core dumps and know what git revision (or pythonmonkey version) they were created with, so that we have a chance of associating them with a right-enough dso in the debugger, even when symbols are stripped.

I'm thinking that an $Id$ string for ident(1) buried in the dso as a static __attribute__((unused)) char[] and then strdup'd at program startup will likely do the trick.

Interested in hearing other solutions.