Fix the order of node record headers written by svndumpfilter.

Reported by: "Brown, Jonathan W" <JonathanW.Brown{_AT_}nuance.com>

* subversion/svndumpfilter/svndumpfilter.c
  (new_node_record): Output 'Node-path' first.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1578670 13f79535-47bb-0310-9956-ffa450edef68