"make clean" problem fix

strings/Makefile.am:
  "make clean" should not remove this file, it is generayed by "configure".
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted

BitKeeper/etc/logging_ok

@@ -27,3 +27,4 @@ serg@serg.mysql.com
 serg@sergbook.mysql.com
 sinisa@rhols221.adsl.netsonic.fi
 zak@balfor.local
+bar@bar.mysql.r18.ru

strings/Makefile.am

@@ -79,7 +79,7 @@ conf_to_src_LDFLAGS= @NOINST_LDFLAGS@
 strtoull.o:		@CHARSET_OBJS@
 
 clean-local:
-	rm -f ctype_extra_sources.c ctype_autoconf.c
+	rm -f ctype_extra_sources.c
 
 if ASSEMBLER
 # On Linux gcc can compile the assembly files