* src/Makefile.in ($(leimdir)/leim-list.el): Remove rule.
(emacs$(EXEEXT)): Don't depend on leim-list.
* lisp/Makefile.in ($(lisp)/loaddefs.el): Depend on gen-lisp again.

* lisp/Makefile.in ($(lisp)/loaddefs.el): Remove gen-lisp for now.

This should improve reproducibility of lisp/loaddefs.el.
* lisp/Makefile.in (gen-lisp): New phony target.
($(lisp)/loaddefs.el, compile-main): Depend on gen-lisp.
* src/Makefile.in ($(leimdir)/leim-list.el): Depend on all of ../leim.
* lisp/cedet/semantic.el (semantic-mode):
* lisp/cedet/semantic/fw.el (top-level):
* lisp/emacs-lisp/eieio-core.el (top-level):
Robustify to generated input files maybe not yet existing.

* lisp/Makefile.in (autoloads .PHONY): Add commentary explaining
why $(lisp)/loaddefs.el is a dependency of '.PHONY'.
($(lisp)/loaddefs.el): Copy an existing loaddefs.el to
loaddefs.tmp before running 'batch-update-autoloads' on it, to
avoid slow regeneration of the full contents.  (Bug#26459)
Use 'move-if-change' instead of 'mv', to avoid producing a new
Emacs binary when not necessary.

In a parallel build, byte compilation can be running at the same times
as loaddefs.el is being regenerated.  However, in a CANNOT_DUMP build,
loaddefs.el is read at startup and must always be in a usable state.

* lisp/Makefile.in ($(lisp)/loaddefs.el): Write generated output to
loaddefs.el.new and then rename it to loaddefs.el.

This shortens the ‘make’ output and should avoid some
repetitive scanning of directories during a build.
* configure.ac (FIND_DELETE): New var.
* lisp/Makefile.in (compile-always, bootstrap-clean):
* test/Makefile.in (clean, bootstrap-clean): Use it.
* test/Makefile.in (ELCFILES, LOGSAVEFILES): Remove; no longer needed.