Bug 1578673 - [mozlint] Skip the file-perm linter on Windows r=ahal

Differential Revision: https://phabricator.services.mozilla.com/D44635

--HG--
extra : moz-landing-system : lando

tools/lint/file-perm/__init__.py

@@ -5,6 +5,7 @@
 from __future__ import absolute_import
 
 import os
+import platform
 
 from mozlint import result
 from mozlint.pathutils import expand_exclusions
@@ -13,6 +14,12 @@ results = []
 
 
 def lint(paths, config, fix=None, **lintargs):
+
+    if platform.system() == 'Windows':
+        # Windows doesn't have permissions in files
+        # Exit now
+        return results
+
     files = list(expand_exclusions(paths, config, lintargs['root']))
     for f in files:
         if os.access(f, os.X_OK):