Fix a test to check duplicated phandles am: 718007765a am: bc2c5f2384 am: cee5ba9a09 am: ec8de9b1b2

Original change: https://android-review.googlesource.com/c/platform/system/libufdt/+/2385752

Change-Id: I8d6adb0680e4d5239686b2ebcbf5eb2b2e34305f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>