linux(4): bump osrelease to 4.4.0.

This is required for the current Arch Linux binaries to work.

PR: 254112
Reviewed By: emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D29218

(cherry picked from commit 156da725d3ef6bbafdb0389aada57cf268f44b1e)