simetbox-openwrt-simet-ma: update for simet-ma v0.16.6

simetbox-openwrt-simet-ma: update for simet-ma v0.16.6

* simetbox-openwrt-simet-ma v0.16.6-1
* Create SIMET_LOCK_DIR on initscript (mode 0770)
* Fix SIMET_RUNTIME_DIR mode, it must be mode 0770