seccomp: add pidfd_getfd syscall (gated by CAP_SYS_PTRACE)
seccomp: add pidfd_getfd syscall (gated by CAP_SYS_PTRACE)

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

containerd/containerd,thaJeztah/containerd,estesp/containerd,vdemeester/containerd,containerd/containerd,mikebrow/containerd,thaJeztah/containerd,dmcgowan/containerd,estesp/containerd,vdemeester/containerd,dmcgowan/containerd,mikebrow/containerd