Remove conditional includes from bootstrap

Remove conditional includes from bootstrap

Previously, bootstrap-emacs includes optional functionality, depending
on the platform which is not needed for bootstrap function.  As a
result, bootstrap-emacs contains different functions in different
circumstances.  If ldefs-boot-auto.el is generated, then loaded
functions will not be added to ldefs-boot-auto.el, although they may be
required during some builds.  With this change, bootstrap-emacs should
always behave the same way and, therefore, require the same autoloads.

 * lisp/loadup.el: No longer load optional includes during bootstrap
   dumping.
 * lisp/ldefs-boot-auto.el: Regenerate.
 * lisp/ldefs-boot-manual.el: Add two autoloads.