Bug#1067643: webkit2gtk: please use architecture whitelist for libseccomp-dev B-D

[Thorsten Glaser]

Source: webkit2gtk
Version: 2.42.5-2
Severity: important
Justification: ftbfs on d-ports architectures
X-Debbugs-Cc: tg at mirbsd.de, debian-68k at lists.debian.org

Please use libseccomp-dev B-D only on architectures where it
actually exists (i.e. is not in state uncompiled).

webkit2gtk is a B-D for glade, which is depended on by the
Xfce stack, as far as I can tell, whose t64 transition this blocks.