[newlib-cygwin] libgloss: add new Build System Internals node to the menu

[Michael Frysinger <vapier@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=845515267b8dfb7198ae5ca9d4a30d58b2a3d995

commit 845515267b8dfb7198ae5ca9d4a30d58b2a3d995
Author: Mike Frysinger <vapier@gentoo.org>
Date:   Fri Mar 4 01:04:25 2022 -0500

    libgloss: add new Build System Internals node to the menu
    
    Seems that some versions of texinfo require the @menu to have all
    entries at the top level, so add the new build one to it.

Diff:
---
 libgloss/doc/porting.texi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libgloss/doc/porting.texi b/libgloss/doc/porting.texi
index 5325fb2ed..496fae352 100644
--- a/libgloss/doc/porting.texi
+++ b/libgloss/doc/porting.texi
@@ -136,6 +136,7 @@ new library is called Libgloss, for Gnu Low-level OS support.
 * Building libgloss::           How to configure and built libgloss
                                 for a target.
 * Board support::               How to add support for a new board.
+* Build System Internals::      How the libgloss build system works.
 @end menu
 
 @node Supported targets, Building libgloss, Libgloss, Libgloss
@@ -311,7 +312,7 @@ used. This is done so libgloss will build automatically with a fresh,
 and uninstalled object tree. It also makes it easier to debug the other
 tools using libgloss's test suites.
 
-@node Board support, , Building libgloss, Libgloss
+@node Board support
 @section Adding Support for a New Board
 
 This section explains how to add support for a new board to libgloss.