Bugfix release for 2.42:
- interfaces/lxd-support: Fix on core18
- interfaces: allow access to ovs bridge sockets
- tests/main/system-usernames: Amazon Linux 2 comes with libseccom 2.4.1 now
- snap-seccomp: add missing clock_getres_time64
- cmd/snap-seccomp/syscalls: update the list of known syscalls
- sandbox/seccomp: accept build ID generated by Go toolchain