Fix 'extraclean' targets

* GNUmakefile: Add description of 'extraclean'.

* Makefile.in (extraclean_dirs): Add lwlib.

* lwlib/Makefile.in (clean mostlyclean extraclean): Add
'extraclean' target.

* lisp/Makefile.in (extraclean): Remove ${loaddefs}, not just
${LOADDEFS}.  Delete all backup and autosave files.

GNUmakefile

@@ -50,6 +50,8 @@ help:
 	@echo "make distclean        -- delete all build and configuration files,"
 	@echo "                         leave only files included in source distribution"
 	@echo "make maintainer-clean -- delete almost everything that can be regenerated"
+	@echo "make extraclean       -- like maintainer-clean, and also all generated files,"
+	@echo "                         backup files and autosave files"
 	@echo "make bootstrap        -- delete all compiled files to force a new bootstrap"
 	@echo "                         from a clean slate, then build in the normal way"
 	@echo "make uninstall        -- remove files installed by 'make install'"

Makefile.in

@@ -923,7 +923,7 @@ maintainer-clean: bootstrap-clean $(maintainer_clean_dirs:=_maintainer-clean)
 ### Note that we abuse this in some subdirectories (eg leim),
 ### to delete some generated files that are slow to rebuild.
 extraclean_dirs = ${NTDIR} lib-src src leim \
-  admin/charsets admin/grammars admin/unidata lisp lib
+  admin/charsets admin/grammars admin/unidata lisp lib lwlib
 
 $(foreach dir,$(extraclean_dirs),$(eval $(call submake_template,$(dir),extraclean)))
 

lisp/Makefile.in

@@ -449,8 +449,10 @@ maintainer-clean: distclean bootstrap-clean
 	rm -f TAGS
 
 extraclean: bootstrap-clean distclean
-	-for file in $(LOADDEFS); do rm -f $${file}~; done
+	-for file in $(loaddefs); do rm -f $${file}~; done
 	-rm -f $(lisp)/loaddefs.el~
+	-find $(lisp) -name '*~' $(FIND_DELETE)
+	-find $(lisp) -name '#*' $(FIND_DELETE)
 
 .PHONY: check-declare
 

lwlib/Makefile.in

@@ -93,9 +93,9 @@ globals_h = ../src/globals.h
 $(globals_h):
 	$(MAKE) -C ../src globals.h
 
-.PHONY: mostlyclean clean distclean bootstrap-clean maintainer-clean
+.PHONY: mostlyclean clean distclean bootstrap-clean maintainer-clean extraclean
 
-clean mostlyclean:
+clean mostlyclean extraclean:
 	rm -f ./*.o liblw.a \#* $(DEPDIR)/*
 
 distclean: clean