x11-fonts/terminus-font: Update to 4.47
Changelog:
- Added 35 new characters (33 glyphs).
- Replaced ao2-variant "ae" with ao1 "ae", it was too similar to "oe".
- Some fixes and improvements (17 characters in various sizes/styles).
- Significantly improved the font build scripts. Python 3.5.0 or node 6.9.0 are now required to build the font.