NetBpfLoad: better log message on program load failure am: bfc0b6187c am: 6947df6b19

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3250531

Change-Id: Ic22b64af53d699e87ac5e122a4cdbfde91cf9821
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>