interfaces/seccomp/template: allow epoll_pwait2 in the base template #14885
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Add epoll_pwait2 in the base template. The syscall has been available since 5.11 (early 2021).
Reported in the forum: https://forum.snapcraft.io/t/epoll-works-on-core20-but-fails-on-core22/44347
Some context: https://kernelnewbies.org/Linux_5.11#Add_epoll_pwait2.282.29_syscall_for_higher_resolution_waits
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