bump version to 5.15 am: 8be3a91a72 am: a6d2500b20 am: acd4b27208 am: 5941ddf028 am: deb4e76ba9

Original change: https://android-review.googlesource.com/c/platform/external/ethtool/+/2804539

Change-Id: Ibb667daa00d8cd785de695fdd027b1e1069c09c6
Signed-off-by: Automerger Merge Worker <[email protected]>