- removed the JS_EVAL_FLAG_STRIP eval flag and replaced it with JS_SetStripInfo() which has simpler semantics.
- qjs: added the '-s' and '--strip-source' options
- qjsc: added the '-s' and '--keep-source' options
- add -t to show timings
- add -C to select compact progress meter
- default to compact progress meter if not attached to console
- set agent stack size to 2MB
- compute module filename relative to current path
- ignore `testdir` for -d and -f options
- return non zero status on errors changes
