Update go_bootstrap from 1.4-0 to 1.4-1 (#3200)

Add pre-built binaries

packages/go_bootstrap.rb

@@ -3,13 +3,21 @@ require 'package'
 class Go_bootstrap < Package
   description 'Bootstrap tool chain for the Go programming language.'
   homepage 'https://golang.org/'
-  version '1.4-0'
-  source_url 'https://storage.googleapis.com/golang/go1.4-bootstrap-20161024.tar.gz'
-  source_sha256 '398c70d9d10541ba9352974cc585c43220b6d8dbcd804ba2c9bd2fbf35fab286'
+  version '1.4-1'
+  source_url 'https://dl.google.com/go/go1.4-bootstrap-20171003.tar.gz'
+  source_sha256 'f4ff5b5eb3a3cae1c993723f3eab519c5bae18866b5e5f96fe1102f0cb5c3e52'
 
   binary_url ({
+    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/go_bootstrap-1.4-1-chromeos-armv7l.tar.xz',
+     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/go_bootstrap-1.4-1-chromeos-armv7l.tar.xz',
+       i686: 'https://dl.bintray.com/chromebrew/chromebrew/go_bootstrap-1.4-1-chromeos-i686.tar.xz',
+     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/go_bootstrap-1.4-1-chromeos-x86_64.tar.xz',
   })
   binary_sha256 ({
+    aarch64: 'dd2aaa41eb1e27a50d9a805f0bbe4b0924bb2fd4ddeccbe2658fb7fd59f48956',
+     armv7l: 'dd2aaa41eb1e27a50d9a805f0bbe4b0924bb2fd4ddeccbe2658fb7fd59f48956',
+       i686: '661fb3c1c1fcebf6a00014e9e1074ee34ca5e60cbdde669b6a49c6931df5e034',
+     x86_64: 'd4a4c1fd6289e2fdbf031ed1da28f21b0f6e58f16e614f248f84f6fabab0555c',
   })
 
   def self.build