[I reported this as a side comment to #1147935 but made a snafu with
the bts commands, so I'm filing a separate bug now.]

As there are no dpkg alternatives to set anymore (automake packaging
switched to a single src:automake with 1.18, I believe) the current
handling of alternatives for automake and aclocal is redundant.

The symlinks /usr/bin/automake and /usr/bin/aclocal should remain as
they're useful but there's no legitimate reason to set them via
dpkg alternatives.  (Automake's own build system installs these as
duplicates of automake-$VER and aclocal-$VER which is a waste of space.)