Renew check-pyc-timestamps.py

- rename it, the are no pyo files on Python 3
- make sure to check all levels of pyc files optimization
- use path globs
- use comprehensions instead of map + filter
- use f-strings and print() instead of sys.stderr.write()

python36.spec

@@ -232,8 +232,8 @@ Source: https://www.python.org/ftp/python/%{version}/Python-%{version}.tar.xz
 
 # A simple script to check timestamps of bytecode files
 # Run in check section with Python that is currently being built
-# Written by bkabrda
-Source8: check-pyc-and-pyo-timestamps.py
+# Originally written by bkabrda
+Source8: check-pyc-timestamps.py
 
 # Desktop menu entry for idle3
 Source10: idle3.desktop