unix: update to Linux kernel 7.0

Change-Id: I2e77f6fa2ac141018c4fe5cba2c8615c9e05d99c
GitHub-Last-Rev: 5d46d8f28324b6815de69e4f81b405c9911bd05a
GitHub-Pull-Request: golang/sys#274
Reviewed-on: https://go-review.googlesource.com/c/sys/+/779140
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>