Merge upstream ethtool 5.3

This merges upstream commit 76c46821fc0e171de6908e0421bb2f032a6eb857
which is ethtool/v5.3^{commit}

(or would be if the tag existed, sent an email to John Linville about that oversight)

See:
  https://git.kernel.org/pub/scm/network/ethtool/ethtool.git/commit/?id=76c46821fc0e171de6908e0421bb2f032a6eb857

Release version 5.3.
Signed-off-by: John W. Linville <linville@tuxdriver.com>

aosp/external/ethtool$ git merge 76c46821fc0e171de6908e0421bb2f032a6eb857
Merge made by the 'recursive' strategy.
 .gitignore   |  3 +++
 NEWS         |  4 ++++
 configure.ac |  2 +-
 ethtool.8.in |  2 +-
 ethtool.c    | 13 +++++++++++--
 igb.c        | 12 ++++++++++++
 6 files changed, 32 insertions(+), 4 deletions(-)

aosp/external/ethtool$ git diff --stat 76c46821fc0e171de6908e0421bb2f032a6eb857
 Android.bp | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 OWNERS     |  1 +
 2 files changed, 47 insertions(+)

Test: builds, Android.bp version number fixups in follow up
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ib82925376ae821ebebe4660246ae946cc9958873