In configure.in, don't remove $AVAILABLE_LANGUAGES_ERRORS_RULES at end

because config.status may later need this file (if it does not find it
it won't incorporate dependencies of errmsg.sys in sql/share/Makefile) (thx Serg).
In sql/share/Makefile.am using "all:" leads to double-"all:" in Makefile (thx Konstantin).

configure.in

@@ -3238,7 +3238,6 @@ AC_CONFIG_FILES(Makefile extra/Makefile mysys/Makefile dnl
  AC_CONFIG_COMMANDS([default], , test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h)
  AC_OUTPUT
 
-rm -f $AVAILABLE_LANGUAGES_ERRORS_RULES
 echo
 echo "MySQL has a Web site at http://www.mysql.com/ which carries details on the"
 echo "latest release, upcoming features, and other information to make your"

sql/share/Makefile.am

@@ -9,7 +9,7 @@ dist-hook:
 	$(INSTALL_DATA) $(srcdir)/charsets/README $(distdir)/charsets
 	$(INSTALL_DATA) $(srcdir)/charsets/Index.xml $(distdir)/charsets
 
-all: @AVAILABLE_LANGUAGES_ERRORS@
+all-local: @AVAILABLE_LANGUAGES_ERRORS@
 
 # this is ugly, but portable
 @AVAILABLE_LANGUAGES_ERRORS_RULES@