* Makefile.in ($(docdir)/gccint.info, gccint.dvi): Add additional
	dependencies.
	* doc/languages.texi, doc/sourcebuild.texi: New files.
	* doc/configfiles.texi: Make a subsubsection.  Update.
	* doc/configterms.texi: Add @node.  Remove warning that this isn't
	instructions for building GCC.
	* doc/makefile.texi: Make a subsection.
	* doc/gccint.texi: Update.

From-SVN: r48731