distcheck: don't ship the generated files.
distcheck: don't ship the generated files.

If we ship them, then ls-files will see them in doc/ in the tarball and
will try to generate a test suite from them, which will result in failure
in a read-only src tree.

	* doc/Makefile.am: here.

urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi