rm-logfiles

Pure/tctical/suppress_tracing: new; can now switch tracing off until the
next tactical call. There is no good way of doing this because of
backtracking.

Pure/tctical/exec_trace_command,tracify,traced_tac: these set, test and
reset suppress_tracing

#! /bin/sh
#rm-logfiles: remove useless files from subdirectories
rm log */make*.log */make*.log.gz
rm */test
find . -name '.*.thy.ML' -print -exec rm {} \;