top level: make more dependencies explicit

[Tom Tromey]

>>>>> "Andrew" == Andrew Cagney <ac131313@redhat.com> writes:

Andrew> What does the GNU coding standard have to say about the
Andrew> release process?

That `make dist' should make a distribution, and that it should ensure
that non-source files in the distribution (e.g., yacc output, info
files, etc), are up to date.

The standards don't say anything about how this is to be implemented.
It is perfectly reasonable to have the dist target run some random
shell script (that is provided in the distribution).

Tom