mosys: Add lchown32 to seccomp

Noticed a crash because of use of lchown32.

BUG=b:186803271
TEST=no more lchown32 fails.

Change-Id: I1dc561fbc792762d11d737fb0c1c01b0066791ba
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/mosys/+/2901319
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
Commit-Queue: Hung-Te Lin <hungte@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Auto-Submit: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
diff --git a/seccomp/mosys-seccomp-arm.policy b/seccomp/mosys-seccomp-arm.policy
index 2d4b9fe..14a8d19 100644
--- a/seccomp/mosys-seccomp-arm.policy
+++ b/seccomp/mosys-seccomp-arm.policy
@@ -29,6 +29,7 @@
 fstatat64: 1
 fsync: 1
 lchown: 1
+lchown32: 1
 lstat64: 1
 lseek: 1
 flock: 1