Having frama-c[gtk] can cause problems if there are plugins compiled
with [-gtk]. It can also cause runtime issues.
Closes: https://bugs.gentoo.org/817314
Closes: https://bugs.gentoo.org/817365
Signed-off-by: François-Xavier Carton <fx.carton91@gmail.com>
USE flags are not meant for this (causing recompilation of everything
when changing plugins configuration). In addition, this solves the
problem of the main frama-c ebuild having too much USE flags.
Signed-off-by: François-Xavier Carton <fx.carton91@gmail.com>