Separate user and internals manuals.

	* Makefile.in (info, $(docdir)/gcc.info, dvi, gcc.dvi): Update
	dependencies.
	($(docdir)/gccint.info, gccint.dvi): New targets.
	(maintainer-clean, install-info, uninstall): Update.
	* doc/.cvsignore: Add gccint.info*.
	* doc/include/gcc-common.texi: New file.
	* doc/gcc.texi: Use it.  Adjust to be a user-only manual.  Put
	copyright notice in a macro.  Don't include ISBN unless FSFPRINT
	is defined.
	* doc/gccint.texi: New file.
	* doc/configfiles.texi, doc/extend.texi, doc/invoke.texi,
	doc/md.texi, doc/passes.texi, doc/tm.texi, doc/trouble.texi:
	Update for separate user and internals manuals.

f:
	* g77.texi, invoke.texi: Update links to GCC manual.

java:
	* gcj.texi: Update link to GCC manual.

From-SVN: r48119