[gtk/fix-introspection-tests-win] Introspection test: Reverse os.add_dll_directory() order

[Chun-wei Fan <fanchunwei src gnome org>]

commit ad554a92d81b9e2cce2c9ca8f4cbc5cbf0586784
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Apr 26 11:19:16 2022 +0800

    Introspection test: Reverse os.add_dll_directory() order
    
    It looks like os.add_dll_directory() works in a LIFO order, so we call
    os.add_dll_directory() from the end of the list of directories in %PATH%
    so that the directories are searched in the correct order.

 testsuite/introspection/api.py | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/testsuite/introspection/api.py b/testsuite/introspection/api.py
index e9bd6a8868..54b58e83bc 100755
--- a/testsuite/introspection/api.py
+++ b/testsuite/introspection/api.py
@@ -10,6 +10,7 @@ import sys
 # by calling os.add_dll_directory() on the valid paths in %PATH%.
 if hasattr(os, 'add_dll_directory'):
     paths = os.environ['PATH'].split(os.pathsep)
+    paths.reverse()
     for path in paths:
         if path != '' and os.path.isdir (path):
             os.add_dll_directory(path)