Imports of package reaper

PathSynopsis
bytesPackage bytes implements functions for the manipulation of byte slices.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/containerd/containerd/sys
github.com/pkg/errorsPackage errors provides simple error handling primitives.
os/execPackage exec runs external commands.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.