fileutils: bring back global module vars

0c646b7 removed several
module level variables, although they are needed by downstream
tools like scancode.
Bring them back in their py3 only variants

Signed-off-by: Konrad Weihmann <kweihmann@outlook.com>

Author: priv-kweihmann

src/commoncode/fileutils.py

@@ -62,6 +62,15 @@ def logger_debug(*args):
     def logger_debug(*args):
         return logger.debug(' '.join(isinstance(a, str) and a or repr(a) for a in args))
 
+PATH_TYPE = compat.unicode
+POSIX_PATH_SEP = '/'
+WIN_PATH_SEP = '\\'
+EMPTY_STRING = ''
+DOT = '.'
+PATH_SEP = compat.unicode(os.sep)
+PATH_ENV_VAR = 'PATH'
+PATH_ENV_SEP = compat.unicode(os.pathsep)
+
 """
 File, paths and directory utility functions.
 """