Add high loglevel regression testing by running tiny pure-asm apps

It is not uncommon for new users to run at -loglevel 5 or higher: but regular developers rarely go that high and we have no tests that high, meaning that such verbosity often bitrots and hits asserts or whatnot. This is a proposal to add some high-loglevel regression tests and keeping them reasonably short and with reasonable disk space by running tiny pure-asm apps (we already have some of those in the suite).