Use testing's libssl1.0.0 instead of unstable's.

We previously fetched it from unstable, but now it depends on
multiarch-support, which depends on unstable's libc6, which depends
on... So in order to not completely mess up the time schedule for
Tails 0.8 we defer that move to a later date.

config/chroot_apt/preferences

@@ -4,7 +4,7 @@ Pin-Priority: 999
 
 Explanation: sid's aircrack-ng dependancy
 Package: libssl1.0.0
-Pin: release o=Debian,a=unstable
+Pin: release o=Debian,a=testing
 Pin-Priority: 999
 
 Package: eatmydata

config/chroot_sources/testing.binary

+testing.chroot
\ No newline at end of file

config/chroot_sources/testing.chroot

+deb http://ftp.us.debian.org/debian/ testing main