For PR automake/343:

For PR automake/343:
* automake.in (scan_texinfo_file) <clean_suffixes>: Remove dvi, ps,
and pdf.
(output_texinfo_build_rules): Define %DIRSTAMP% when processing
texibuild.am.  Return $dirstamp and a list of files to clean.
(handle_texinfo_helper): Process texi-vers.am after the call to
output_texinfo_build_rules and use $dirstamp to define %DIRSTAMP%.
* lib/am/texi-vers.am (%STAMPVTI%): Build %DIRSTAMP% if needed.
* lib/am/texibuild.am (%DEST_PREFIX%%DEST_SUFFIX%): Likewise.
(%DEST_PREFIX%.dvi, %DEST_PREFIX%.pdf): Depend on %DIRSTAMP%.
* tests/texinfo13.test: New file.
* tests/Makefile.am (TESTS): Add texinfo13.test.
* lib/am/texinfos.am (install-info-am, dist-info): Looks for
info files in build or source directory.
This completes the change from 2002-07-30 (for PR automake/168).