mysql: update to 5.1.66 and clean up the makefile, fixes #11065

git-svn-id: svn://svn.openwrt.org/openwrt/packages@35122 3c298f89-4303-0410-b956-a3cf2f4a3e73

libs/mysql/patches/100-fix_hostname.patch

@@ -0,0 +1,11 @@
+--- a/scripts/mysql_install_db.sh
++++ b/scripts/mysql_install_db.sh
+@@ -322,7 +322,7 @@
+ fi
+ 
+ # Try to determine the hostname
+-hostname=`@HOSTNAME@`
++hostname=`cat /proc/sys/kernel/hostname`
+ 
+ # Check if hostname is valid
+ if test "$cross_bootstrap" -eq 0 -a "$in_rpm" -eq 0 -a "$force" -eq 0