Need to clone the task struct fields related to RCU aswell in the
LinuxKPI after r359727. This fixes a minor regression issue. Else the
priority tracking won't work properly when both sleepable and
non-sleepable RCU is in use on the same thread.

Bump the __FreeBSD_version to force recompilation of external kernel
modules.

PR: 242272
MFC after: 1 week
Sponsored by: Mellanox Technologies