Add llvm-objcopy to android_sdk_repo_host's implicit tools am: df34caf8

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2860767



Change-Id: Ic24df298c9c4444b59a8bf835e84af0afaa3ea18
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>