Uniform handling of per-object compilation rules.

Uniform handling of per-object compilation rules.
Note: Automake is repaired.
* automake.in (&handle_languages): Output per object rules for all
the objects, not only for those which language supports dependency
tracking.
Fix Automake: when outputting per-object rules, use `-o' if the
language has no `output_flag', as it's really needed.
(&handle_single_transform_list): Instead of special casing files
which need per object rules but which language don't support
dependency tracking, keep them in the queue for processing by
`&handle_languages'.