Added descriptions and homepages

packages/cloog.rb

 require 'package'
 
 class Cloog < Package
+  description 'Chunky Loop Generator which is used to perform optimization in gcc'
+  homepage 'https://www.cloog.org/'
   version "0.18.4-cc1.3"
   binary_url ({
     aarch64: 'https://github.com/jam7/chrome-cross/releases/download/v1.3/cloog-0.18.4-cc1.3-chromeos-armv7l.tar.xz',

packages/glibc223.rb

 require 'package'
 
 class Glibc223 < Package
+  description 'GNU C Library'
+  homepage 'https://www.gnu.org/software/libc/'
   version '2.23-cc1.3'
   binary_url ({
     aarch64: 'https://github.com/jam7/chrome-cross/releases/download/v1.3/glibc-2.23-cc1.3-chromeos-armv7l.tar.xz',

packages/isl.rb

 require 'package'
 
 class Isl < Package
+  description 'Integer Set Library for manipulating sets and relations of integer points bounded by linear constraints'
+  homepage 'http://isl.gforge.inria.fr/'
   version "0.14.1-cc1.3"
   binary_url ({
     aarch64: 'https://github.com/jam7/chrome-cross/releases/download/v1.3/isl-0.14.1-cc1.3-chromeos-armv7l.tar.xz',