swig-py: tests: Use svn.core.svn_dirent_join to make internal path. 

* subversion/bindings/swig/python/tests/client.py
  (SubversionClientTestCase.test_propset_local): Use svn.core.svn_dirent_join
    to make list of target paths of svn.client.propset_local, which should
    be Subversion's internal path.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1886873 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/subversion/bindings/swig/python/tests/client.py b/subversion/bindings/swig/python/tests/client.py
index bfc140a..258d9d3 100644
--- a/subversion/bindings/swig/python/tests/client.py
+++ b/subversion/bindings/swig/python/tests/client.py
@@ -528,7 +528,7 @@
 
     path = self.temper.alloc_empty_dir('-propset_local')
 
-    target_path = os.path.join(path, b'trunk', b'README.txt') 
+    target_path = core.svn_dirent_join(path, b'trunk/README.txt')
     target_prop = b'local_prop_test'
     prop_val1 = b'foo'