[cairo] add pre-built packages

packages/cairo.rb

@@ -7,6 +7,19 @@ class Cairo < Package
   source_url 'https://fossies.org/linux/misc/cairo-1.15.10.tar.xz'
   source_sha256 '62ca226134cf2f1fd114bea06f8b374eb37f35d8e22487eaa54d5e9428958392'
 
+  binary_url ({
+    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/cairo-1.15.10-0-chromeos-armv7l.tar.xz',
+     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/cairo-1.15.10-0-chromeos-armv7l.tar.xz',
+       i686: 'https://dl.bintray.com/chromebrew/chromebrew/cairo-1.15.10-0-chromeos-i686.tar.xz',
+     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/cairo-1.15.10-0-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+    aarch64: '198c368f87760cfa8702a9b4ad8c9abd338cf18cdbfea01257434ddff9c81812',
+     armv7l: '198c368f87760cfa8702a9b4ad8c9abd338cf18cdbfea01257434ddff9c81812',
+       i686: '3e6482d16a21bd17d3a78c68b6b2d724d529c1763bd998efd8924c37bd378c96',
+     x86_64: '1cf92bcaf00709c297227f6f2ac1388d06f8978a89fc6207ba1ab0cee7a777fd',
+  })
+
   depends_on 'libpng'
   depends_on 'pixman'
   depends_on 'fontconfig' # pango requires cairo with fontconfig