Create an initial version of libfdt fuzzer. am: 49a2e71ae0 am: 85189c3a6a am: 1511571160

Original change: https://android-review.googlesource.com/c/platform/external/dtc/+/1987187

Change-Id: I3caf942bd2f42e309ae49e8e29fe05a0a7e33450