Add dirgroup for trusty genrule am: 5bc523e791 am: bbf722c330

Original change: https://android-review.googlesource.com/c/platform/system/libcppbor/+/3303707

Change-Id: I66405841567bf5e8d1a77b3f7954f6c34e90b6c1
Signed-off-by: Automerger Merge Worker <[email protected]>