minicom: RDEPENDS on ncurses-terminfo-base

Fixed when ncurses-terminfo-base is not installed:
$ minicom
No termcap database present!

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 15198ebe)
Signed-off-by: Steve Sakoman <steve@sakoman.com>