Imports of objdump command

PathSynopsis
cmd/internal/objfilePackage objfile implements portable access to OS-specific executable files.
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
logPackage log implements a simple logging package.
osPackage os provides a platform-independent interface to operating system functionality.
regexpPackage regexp implements regular expression search.
strconvPackage strconv implements conversions to and from string representations of basic data types.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.