package/joe: Add package for the JOE editor

JOE is an easy-to-use, full-screen, terminal-based text editor.

http://joe-editor.sf.net



[Peter: add uClibc patch, add to package/Config.in, optional ncurses support]
Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>