Imports of package build

PathSynopsis
bufioPackage bufio implements buffered I/O. It wraps an io.Reader or io.Writer object, creating another object (Reader or Writer) that also implements the interface but provides buffering and some help for textual I/O.
bytesPackage bytes implements functions for the manipulation of byte slices.
errorsPackage errors implements functions to manipulate errors.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
go/astPackage ast declares the types used to represent syntax trees for Go packages.
go/build/constraintPackage constraint implements parsing and evaluation of build constraint lines.
go/docPackage doc extracts source code documentation from a Go AST.
go/parserPackage parser implements a parser for Go source files.
go/scannerPackage scanner implements a scanner for Go source text.
go/tokenPackage token defines constants representing the lexical tokens of the Go programming language and basic operations on tokens (printing, predicates).
internal/buildcfgPackage buildcfg provides access to the build configuration described by the current environment.
internal/godebugPackage godebug makes the settings in the $GODEBUG environment variable available to other packages.
internal/goroot
internal/goversion
internal/platform
ioPackage io provides basic interfaces to I/O primitives.
io/fsPackage fs defines basic interfaces to a file system.
osPackage os provides a platform-independent interface to operating system functionality.
os/execPackage exec runs external commands.
pathPackage path implements utility routines for manipulating slash-separated paths.
path/filepathPackage filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths.
runtimePackage runtime contains operations that interact with Go's runtime system, such as functions to control goroutines.
slicesPackage slices defines various functions useful with slices of any type.
strconvPackage strconv implements conversions to and from string representations of basic data types.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.
unicodePackage unicode provides data and functions to test some properties of Unicode code points.
unicode/utf8Package utf8 implements functions and constants to support text encoded in UTF-8.
unsafePackage unsafe contains operations that step around the type safety of Go programs.