Make it clearer that readline support for the target build is now
disabled by default.
Since readline dependencies and configure options are now handled by
PACKAGECONFIG, avoid duplicating readline in DEPENDS or duplicating
--disable-readline in EXTRA_OECONF.
Also add --disable-editline to EXTRA_OECONF to avoid a potential
floating dependency, since the configure script checks for libedit
before it checks for libreadline.
Signed-off-by: Andre McCurdy <armccurdy@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
