Download  http://downloads.openwrt.org/attitude_adjustment/12.09/ar71xx/generic/packages/libopenssl_1.0.1g-1_ar71xx.ipk in /tmp

Install by running: opkg install /tmp/http://downloads.openwrt.org/attitude_adjustment/12.09/ar71xx/generic/packages/libopenssl_1.0.1g-1_ar71xx.ipk

Thats it!