Make ncurses recognize UTF8 support

This PR adds the `U8#1` option to the terminfo file, this is an extended option in the terminfo specifying support for utf8 line graphics. This fixes some issues with ncurses not rendering utf8 glyphs for it's extended ASCII set when termite supports utf8 just fine.

Here's my [Arch forum post](https://bbs.archlinux.org/viewtopic.php?id=163103) describing the solution more in-depth.

*Full disclosure:* I really have no experience with terminfo files and don't know if this could cause other problems. Hopefully someone more knowledgeable than me can let me know if it's OK or not.

Thanks!