specify trace event in LISPM_EVAL_CHECK args

git: commit

I noticed very long ago that the ctx argument to LISPM_EVAL_CHECK has its shortcomings. For example, it is impossible to naturally use it in lexer before we added the symbol to the strings table. In addition, sometimes I’d like to pass more than one symbol of context.

This change uses the established tracing capabilities to outsource the mechanics of error handling to the environment, because the behavior of VM itself does not depend on the kind of error – it always terminates regardless.

I also patch tests to recognize errors, although I am not happy with the way it is currently done. I have an idea how to make it better.

As a bonus, this change reduces the .text section by more than 100 bytes in optimized mode. Probably, because I pass one argument less to lispm_abort