Imports of getting_started command

PathSynopsis
github.com/cilium/ebpf/linkPackage link allows attaching eBPF programs to various kernel hooks.
github.com/cilium/ebpf/rlimitPackage rlimit allows raising RLIMIT_MEMLOCK if necessary for the use of BPF.
logPackage log implements a simple logging package.
netPackage net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets.
osPackage os provides a platform-independent interface to operating system functionality.
os/signalPackage signal implements access to incoming signals.
timePackage time provides functionality for measuring and displaying time.