clat: log if SIGKILL fails am: 74b0d066c6

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2535199

Change-Id: I46093e2c7ae65b6e39a99eb0095f5185eeeccdee
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>