Imports of sst-ctl command

PathSynopsis
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/intel/goresctrl/pkg/sst
github.com/intel/goresctrl/pkg/utils
osPackage os provides a platform-independent interface to operating system functionality.
sortPackage sort provides primitives for sorting slices and user-defined collections.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.