Bug#676914: libsasl2-2: binNMU broke multi-arch installability

I don't know if it's redundant or inappropriate to mention this here, but the
corresponding version of libsasl2-modules has an identical install bug:

dpkg: error processing
/var/cache/apt/archives/libsasl2-modules_2.1.25.dfsg1-4+b1_i386.deb (--unpack):
 trying to overwrite shared
'/usr/share/doc/libsasl2-modules/changelog.Debian.gz', which is different from
other instances of package libsasl2-modules:i386

Hopefully these can both be fixed at the same time?

 - Anne