[automerge] libfdt: fdt_path_offset_namelen: Reject empty paths 2p: a6ac6d916d am: bfb9c7cab7

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/dtc/+/20024810

Change-Id: I6dce4a0990a614c99b3c52e013cd67fcbba927cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>