adds create_if_missing to remote file action

at the moment the source recipe was downloading nodejs source all the time. With this change is just downloaded the first time

Author: videlalvaro

recipes/install_from_source.rb

@@ -33,6 +33,7 @@
   source node['nodejs']['src_url']
   checksum node['nodejs']['checksum']
   mode 0644
+  action :create_if_missing 
 end
 
 # --no-same-owner required overcome "Cannot change ownership" bug