Missing the 'r' on the end.

I missed adding the 'r' to the end of the function.  Fixing this so that instead of `vssh` which we already have an alias for, we have instead `vsshr`.

plugins/available/vagrant-as-root.plugin.bash

@@ -1,4 +1,4 @@
 # Simple function for vagrant ssh that immediately switches to root.
-function vssh() {
+function vsshr() {
       vagrant ssh $1 -- -t 'sudo su -; /bin/bash'
   }