Return an error on failed packages

Author: mykter

templates/expect-script.erb

@@ -2,5 +2,6 @@ set timeout -1;
 spawn <%= scope.lookupvar('android::paths::sdk_home') %>/tools/android update sdk -u --all -t <%= @title %> <%= @proxy_host %> <%= @proxy_port %>; 
 expect { 
     "Do you accept the license" { exp_send "y\r" ; exp_continue }
+    "Error: Ignoring unknown package" { exit 1 }
     eof
 }