Issue #27726: Fix "make tags"

* Memove -t option of ctags. The option was kept for backward compatibility,
  but it was completly removed recently. Patch written by Stéphane Wirtel.
* Set locale to C to call sort. vim expects that the tags file is sorted using
  english collation, so it fails if the locale is french for example. Use
  LC_ALL=C to force english sorting order. .

Makefile.pre.in

@@ -1548,10 +1548,10 @@ autoconf:
 # Create a tags file for vi
 tags::
 	cd $(srcdir); \
-	ctags -w -t Include/*.h; \
-	for i in $(SRCDIRS); do ctags -w -t -a $$i/*.[ch]; \
+	ctags -w Include/*.h; \
+	for i in $(SRCDIRS); do ctags -w -a $$i/*.[ch]; \
 	done; \
-	sort -o tags tags
+	LC_ALL=C sort -o tags tags
 
 # Create a tags file for GNU Emacs
 TAGS::