Heap-embed uniqtype ptrs only for NDEBUG builds, to help debugging.
Quieten dumptypes debugging output.
objdumpallocs: use temporary files more and in-memory data less.
Remove obsolete suppress_warning flag from is_a check.
Refactor allocation snooping out of __is_a_internal into a separate function.
Fix test/Makefile's grep check.
Make crunchcc and helpers stdout-clean.
dumpallocs: don't mangle space-containing type names.
Fix bug where extended mappings were triggering assertion failure in debug builds.