Fix platform_FilePerms.

We need to account for the new /var/run/debugfs_gpu bind mount point.

BUG=None
TEST=Passes on lumpy.

Change-Id: I9fb130444d839b5a9ae6eaf717beb21acdae9452
Previous-Reviewed-on: https://gerrit.chromium.org/gerrit/43539
(cherry picked from commit 244da8948b944acc7e9ce0eb9eb8b67e8e7afd9f)
Reviewed-on: https://gerrit.chromium.org/gerrit/43561
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Tested-by: James Cook <jamescook@chromium.org>
diff --git a/client/site_tests/platform_FilePerms/platform_FilePerms.py b/client/site_tests/platform_FilePerms/platform_FilePerms.py
index ec46c75..9a77b11 100644
--- a/client/site_tests/platform_FilePerms/platform_FilePerms.py
+++ b/client/site_tests/platform_FilePerms/platform_FilePerms.py
@@ -70,6 +70,11 @@
             'type': 'tmpfs',
             'options': ['rw', 'nosuid', 'nodev', 'noexec', 'relatime',
                         'mode=755']},
+        # Special case, we want to track group/mode too.
+        '/var/run/debugfs_gpu': {
+            'type': 'debugfs',
+            'options': ['rw', 'nosuid', 'nodev', 'noexec', 'relatime',
+                        'gid=216', 'mode=750']},
         '/usr/share/oem': { # crosbug.com/34688
             'type': 'ext4',
             'options': ['ro', 'nosuid', 'nodev', 'noexec', 'relatime']},