lib/dwke: fix parsing known_problem definitions using EXCLUDE_PATTERN

Signed-off-by: Andreas Beckmann <anbe@debian.org>
update special cases for experimental

Signed-off-by: Andreas Beckmann <anbe@debian.org>
scripts: enable foreign architectures for crossbuild-essential-*

Signed-off-by: Andreas Beckmann <anbe@debian.org>
scripts: report unowned links in [/usr]/lib[/<triplet>]

ldconfig creates them if missing, but they should better be shipped
in the package

Signed-off-by: Andreas Beckmann <anbe@debian.org>
known_problems: report unowned symlinks in lib directories

Signed-off-by: Andreas Beckmann <anbe@debian.org>