Update boost from 1.66.0 to 1.71.0 (#3514)

packages/boost.rb

@@ -2,22 +2,14 @@ require 'package'
 
 class Boost < Package
   description 'Boost provides free peer-reviewed portable C++ source libraries.'
-  homepage 'http://www.boost.org/'
-  version '1.66.0'
-  source_url 'https://downloads.sourceforge.net/project/boost/boost/1.66.0/boost_1_66_0.tar.bz2'
-  source_sha256 '5721818253e6a0989583192f96782c4a98eb6204965316df9f5ad75819225ca9'
+  homepage 'https://www.boost.org/'
+  version '1.71.0'
+  source_url 'https://dl.bintray.com/boostorg/release/1.71.0/source/boost_1_71_0.tar.bz2'
+  source_sha256 'd73a8da01e8bf8c7eda40b4c84915071a8c8a0df4a6734537ddde4a8580524ee'
 
   binary_url ({
-    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/boost-1.66.0-chromeos-armv7l.tar.xz',
-     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/boost-1.66.0-chromeos-armv7l.tar.xz',
-       i686: 'https://dl.bintray.com/chromebrew/chromebrew/boost-1.66.0-chromeos-i686.tar.xz',
-     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/boost-1.66.0-chromeos-x86_64.tar.xz',
   })
   binary_sha256 ({
-    aarch64: '2dbbe25f491f89c331ad9a7f36a2ffbc245db4621d43b5beb0772f07dfc8704c',
-     armv7l: '2dbbe25f491f89c331ad9a7f36a2ffbc245db4621d43b5beb0772f07dfc8704c',
-       i686: '193afe14c196b23424caa03c845ffba12390cfbf84248f94398494502e7be7f3',
-     x86_64: '527a50ab5e9dc7420a63f5ee6f3826ab9816f7f65ab2e87f54ac4cef9b452d67',
   })
 
   def self.build