net/wireguard-kmod: Add patch to fix panic due to missing epoch tracking in transmit

Obtained from: https://git.zx2c4.com/wireguard-freebsd/commit/?id=e03bf597383cef7f16c41fa4952a6b04093e9e64

(cherry picked from commit 98c107c85696297c2a1ec986b3f76e67f7590771)