Rename Cmake vars for ncurses libraries.
Rename Cmake vars for ncurses libraries.

Change `ncurses`, `menu` and `form` variables to `LIB_NCURSES`,
`LIB_MENU` and `LIB_FORM`.

donmccaughey/FiendsAndFortune,donmccaughey/FiendsAndFortune,donmccaughey/FiendsAndFortune