build: Add BUILD.bazel file am: b148d78706

Original change: https://android-review.googlesource.com/c/platform/external/dtc/+/2569090

Change-Id: Ifa42047c4af371423fd39d5a57d3a20b026903a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>