Upgrade OpenSSL on Arch to avoid mismatch errors.

Author: coderanger

lib/kitchen/driver/docker.rb

@@ -203,7 +203,7 @@ def build_dockerfile
           <<-eos
             RUN pacman --noconfirm -Sy archlinux-keyring
             RUN pacman-db-upgrade
-            RUN pacman --noconfirm -Sy openssh sudo curl
+            RUN pacman --noconfirm -Sy openssl openssh sudo curl
             RUN ssh-keygen -A -t rsa -f /etc/ssh/ssh_host_rsa_key
             RUN ssh-keygen -A -t dsa -f /etc/ssh/ssh_host_dsa_key
           eos