eclass-overlay: Add user metrics to group debugfs-access

metrics_daemon needs to access debugfs for logging i915 GPU frequency in
vmlog. Add user metrics to group debugfs-access for the permission.

BUG=chromium:989366
TEST=Build and boot. Verify that vmlog contains i915 GPU frequency.

Change-Id: I7c1b7c0eb60962261fd6e245297d8a99bee6442f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/1849073
Reviewed-by: Allen Webb <allenwebb@google.com>
Tested-by: Chinglin Yu <chinglinyu@chromium.org>
Commit-Queue: Chinglin Yu <chinglinyu@chromium.org>
diff --git a/profiles/base/accounts/group/debugfs-access b/profiles/base/accounts/group/debugfs-access
index 63d4395..adb5a34 100644
--- a/profiles/base/accounts/group/debugfs-access
+++ b/profiles/base/accounts/group/debugfs-access
@@ -1,3 +1,3 @@
 group:debugfs-access
 gid:605
-users:arc-camera,shill,power
+users:arc-camera,shill,power,metrics