Max out syslog-async buffers

I/O constrained systems running in debug mode may drop messages with
the default buffer of 5 lines.

Raise to the max 99 lines.
runtests:  pass -v option to child 'runtests' runs

Users supply '-v' to runtests to get verbose operation; recursive
execution of runtests should also run verbosely.

Print message indicating verbose output enabled.
tests/module-loading/shared-test.sh:  dump hal output on fail

Cryptic 'num pins found != num expected' isn't helpful.