Imports of package work

PathSynopsis
bufio
bytes
cmd/go/internal/base
cmd/go/internal/cache
cmd/go/internal/cfg
cmd/go/internal/fsys
cmd/go/internal/load
cmd/go/internal/modload
cmd/go/internal/search
cmd/go/internal/str
cmd/go/internal/trace
cmd/internal/buildid
cmd/internal/objabi
cmd/internal/pkgpath
cmd/internal/quoted
cmd/internal/sys
container/heap
context
crypto/sha1
debug/elf
encoding/json
errors
fmt
go/build
internal/buildcfg
internal/execabs
internal/lazyregexp
io
io/fs
log
math/rand
os
path/filepath
regexp
runtime
strconv
strings
sync
time