fixing Warning for acmd.py filter_files

To extract single evts or a list of evts from whatever file the
command 'acmd.py filter_files' is one of the recommended ways.
However, this command issues the following warning since a long
time:

WARNING Please stop using AtlCopyBSEvent.exe, and use AtlCopyBSEvent instead

This MR fixes that warning.


Former-commit-id: 16925630

Tools/PyUtils/python/scripts/filter_files.py

@@ -111,7 +111,7 @@ def main(args):
         # optimization: run directly 'AtlCopyBSEvent.exe
         import subprocess
         cmd = ' '.join([
-            'AtlCopyBSEvent.exe',
+            'AtlCopyBSEvent',
             '-e %(evt-list)s',
             '%(run-list)s',
             '--out %(output)s',