termcol: shovel knight variant of ppu

Colours copied from conversion at <https://en.wikipedia.org/
?title=List_of_video_game_console_palettes&oldid=770553908#NES>
which should match the actual game:
<https://www.reddit.com/r/gamegrumps/comments/1c0ppo/shovel_knight_game_grumps/c9c54av/>

Append custom colours as described at:
<http://yachtclubgames.com/2014/07/breaking-the-nes/>