rth: change the working directory on Windows

The tests need to change the working directory when executing on Windows
as RPATH is not supported on the platform.  The current working
directory gets precedence over `PATH` for library lookup.  This allows
the last of the Evolution tests pass on Windows.

Author: compnerd

utils/rth

@@ -15,6 +15,7 @@ import argparse
 import glob
 import os
 import pipes
+import platform
 import shlex
 import shutil
 import subprocess
@@ -224,6 +225,10 @@ class ResilienceTest(object):
                 os.path.join(self.tmp_dir, self.config_dir_map[config1], '*'))
             command = self.target_run + [output_obj] + tmp_dir_contents
             verbose_print_command(command)
+            # Windows does not have RPATH, make sure that we change the current
+            # working directory before we execute the test.
+            if platform.system() == 'Windows':
+                os.chdir(self.config_dir_map[config1])
             returncode = subprocess.call(command)
             assert returncode == 0, str(command)