Add another helper function when finding the correct path for the Ev2 shims.
Add another helper function when finding the correct path for the Ev2 shims.

* subversion/libsvn_repos/commit.c
  (rationalize_shim_path): New.
  (fetch_props_func, fetch_kind_func, fetch_base_func): Use the helper.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion