[$] vDSO, 32-bit time, and seccomp

The seccomp()mechanism is notoriously difficult to use. It also turns out to be easy tobreak unintentionally, as the development community discovered when atimekeeping change meant to address the year-2038 problem created a regression forseccomp() users in the 5.3 kernel. Work is underway to mitigatethe problem for now, but seccomp() users on 32-bit systems arelikely to have to change their configurations at some point.