- add built-in support for mkmtkhdr for mtk devices (see: https://github.com/osm0sis/mkmtkhdr) - fix insert_line when inserting after the last line
- add built-in support for mkmtkhdr for mtk devices (see: https://github.com/osm0sis/mkmtkhdr) - fix insert_line when inserting after the last line