mysql_client: security bump to version 5.1.66

Fixes multiple security isssues, most of them of the server component
though.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/mysql_client/mysql_client.mk

@@ -4,7 +4,7 @@
 #
 #############################################################
 
-MYSQL_CLIENT_VERSION = 5.1.65
+MYSQL_CLIENT_VERSION = 5.1.66
 MYSQL_CLIENT_SOURCE = mysql-$(MYSQL_CLIENT_VERSION).tar.gz
 MYSQL_CLIENT_SITE = http://downloads.skysql.com/archives/mysql-5.1
 MYSQL_CLIENT_INSTALL_STAGING = YES