PR bootstrap/12512
	* Makefile.in (info): Use double-colon rules.
	(dvi): Likewise.
	(generated-manpages): Likewise.
	* configure.in: Do not create lang.info, lang.dvi, or
	lang.generated-manpages hooks.
	* configure: Regenerated.
	* objc/Make-lang.in (objc.info): Remove.
	(objc.dvi): Remove.
	(objc.generated-manpages): Remove.
	* doc/sourcebuild.texi: Update description of info, dvi, and
	generated-manpages hooks.

	* Make-lang.in (ada.info): Replace with ...
	(info): ... this.
	(ada.dvi): Replace with ...
	(dvi): ... this.

	* Make-lang.in (c++.info): Remove.
	(c++.dvi): Remove.
	(c++.generated-manpages): Replace with ...
	(generated-manpages): ... this.

	* Make-lang.in (f77.info): Replace with ...
	(info): ... this.
	(f77.dvi): Replace with ...
	(dvi): ... this.
	(f77.generated-manpages): Replace with ...
	(generated-manpages): ... this.

	* Make-lang.in (java.info): Replace with ...
	(info): ... this.
	(java.dvi): Replace with ...
	(dvi): ... this.
	(java.generated-manpages): Replace with ...

	* Make-lang.in (treelang.info): Replace with ...
	(info): ... this.
	* Make-lang.in (treelang.dvi): Replace with ...
	(dvi): ... this.

From-SVN: r72135