[PyROOT] Add ISO8859-1 to list of known modules at import time

The module ISO8859-1 is used for text encoding, appeared first on
fedora32.

Author: stwunsch

bindings/pyroot/pythonizations/test/import_load_libs.py

@@ -60,6 +60,7 @@ class ImportLoadLibs(unittest.TestCase):
             'binascii',
             'libbz2',
             'libexpat',
+            'ISO8859-1',
             # System libraries and others
             'libnss_.*',
             'ld.*',