payload_generator: Fix distribution for LLVM roll am: 9dbc6607f9 am: b7e239117f

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2087853

Change-Id: Ic3877bc3fe049ce873626ccb6055058f833c6bc2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>