yi-hack-Allwinner 0.3.7

Write /tmp/mmap.info for all models (set_tz_offset)
Restore standard process priority
Fix wrong order (clean_records.sh)
Add support for h501gc
Improve hack with wireless credentials
Fix unbrick for h501gc
Add new models to set_tz_offset
Move up events table
Fix available memory value
Kernel tuning (thanks to @nemonoid)
Don't restart rtsp if the cam is switched off
Fix warnings in ha
Update onvif_simple_server to the last version
Remove timing info for hevc and align the code with v2
Partial rewrite of RTSP server
Improve clean_records.sh