html: Set CONTENTS_OUTPUT_LOCATION=inline if makeinfo supports it
This flag allows us to restore old (pre-6.8) behavior of the
@{summary,}content commands, so that texi2any continues to emit
summarycontents first.
maintainer-scripts/ChangeLog:
* update_web_docs_git: Set CONTENTS_OUTPUT_LOCATION=inline in
order to put @shortcontents above contents.
gcc/ChangeLog:
* configure.ac: Add check for the Texinfo 6.8
CONTENTS_OUTPUT_LOCATION customization variable and set it if
supported.
* configure: Regenerate.
* Makefile.in (MAKEINFO_TOC_INLINE_FLAG): New variable. Set by
configure.ac to -c CONTENTS_OUTPUT_LOCATION=inline if
CONTENTS_OUTPUT_LOCATION support is detected, empty otherwise.
($(build_htmldir)/%/index.html): Pass MAKEINFO_TOC_INLINE_FLAG.