gpu: Allow F_GET_SEALS arg in fcntl
gpu: Allow F_GET_SEALS arg in fcntl

This is used in upcoming virglrenderer change:
https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/688

BUG=None
TEST=manual - push updated policy to device and no crash.

Change-Id: Ic95d2cedcc13542b6ee3864b5a39ed2bce794c3a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3453118
Reviewed-by: Daniel Verkamp <72bc170b46ec491f7bdd4359a1c0bfed274de40c@chromium.org>
Auto-Submit: Lepton Wu <98fe55dd9d3c1cbbf1dc9faf0be9e8ebf7fc5bb6@chromium.org>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Commit-Queue: Lepton Wu <98fe55dd9d3c1cbbf1dc9faf0be9e8ebf7fc5bb6@chromium.org>
Reviewed-by: Yiwei Zhang <8740d9f1664e48d07df551c300bbdb1ae03f6b48@chromium.org>

google/crosvm,google/crosvm,google/crosvm,google/crosvm