Install steps - Fixed typo for installation of rvm on Linux

scripts/create-dev-env.sh

@@ -316,7 +316,7 @@ case `uname -s` in
                 http://stackoverflow.com/questions/9056008/installed-ruby-1-9-3-with-rvm-but-command-line-doesnt-show-ruby-v/9056395#9056395"
         sudo apt-get --purge remove ruby-rvm
         sudo rm -rf /usr/share/ruby-rvm /etc/rvmrc /etc/profile.d/rvm.sh
-        curl -sL https://get.rvm.io | bash -s stable --ruby --autolibs=enable --autodotfiles
+        curl -sL https://get.rvm.io | bash -s stable --ruby --autolibs=enable --auto-dotfiles
     ;;
 esac