Imports of pprof command

PathSynopsis
cmd/internal/objfilePackage objfile implements portable access to OS-specific executable files.
cmd/pprof/internal/commands
cmd/pprof/internal/driver
cmd/pprof/internal/fetch
cmd/pprof/internal/plugin
cmd/pprof/internal/profile
cmd/pprof/internal/symbolizer
cmd/pprof/internal/symbolz
debug/gosymPackage gosym implements access to the Go symbol and line number tables embedded in Go binaries generated by the gc compilers.
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
osPackage os provides a platform-independent interface to operating system functionality.
regexpPackage regexp implements regular expression search.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.