ethtool: (re)import of git.netfilter.org/libmnl @ master am: 754121296c

Original change: https://android-review.googlesource.com/c/platform/external/ethtool/+/3525054

Change-Id: I59f11e38dd9d8c7c4d68efc0e632cc0a64a708cc
Signed-off-by: Automerger Merge Worker <[email protected]>