gnat-4.4 is blocking most big transitions atm

[Luk Claes <luk@debian.org>]

Hi

gnat-4.4 FTBFS on mipsel which is blocking gcc-defaults from migrating
to testing which is blocking at least the poppler and gnome related
transitions. xulrunner was reuploaded again and needs to be built
everywhere first before we can reconsider forcing it in.

cmake and xulrunner had some strange build failure when generating the
debs, it would be good if someone can reproduce (or not ;-)) any of this
build failures (gnat-4.4, cmake, xulrunner) while the mipsel buildds are
catching up.

Cheers

Luk