mail-client/roundcube: 1.4.0 version bump

mail-client/roundcube: 1.4.0 version bump

 - Embrace upstream's complete-dist, which includes PEAR, etc
   dependancies as compsoser would have installed them.  We just seem
   like we cannot keep up with the needed dependency ebuilds.
 - Removes use flags which aren't needed due to complete-dist.
 - Adds ${MY_PV} which adjusts for gentoo vs upstream formatting of
   _rc1/_beta/etc.

Closes: https://bugs.gentoo.org/666718
Closes: https://github.com/gentoo/gentoo/pull/13662
Package-Manager: Portage-2.3.76, Repoman-2.3.16
Signed-off-by: Philippe Chaintreuil <gentoo_bugs_peep@parallaxshift.com>
Closes: https://github.com/gentoo/gentoo/pull/13662
Signed-off-by: Aaron W. Swenson <titanofold@gentoo.org>