ethtool: import of git.netfilter.org/libmnl @ master am: 03c9e310b4 am: 3dad929241 am: 12e9b0b635

Original change: https://android-review.googlesource.com/c/platform/external/ethtool/+/2804533

Change-Id: I8a2277a430d309393bf6f8a6e270ef313565f7e6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>