convert shebang lines: python -> python3
diff --git a/Tools/scripts/copytime.py b/Tools/scripts/copytime.py
index ba4a267..e0220b5 100755
--- a/Tools/scripts/copytime.py
+++ b/Tools/scripts/copytime.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 # Copy one file's atime and mtime to another