Add nss_mdns package

Add pre-built binaries

packages/nss_mdns.rb

+require 'package'
+
+class Nss_mdns < Package
+  description 'NSS module for Multicast DNS name resolution'
+  homepage 'https://salsa.debian.org/debian/nss-mdns'
+  version '0.14.1'
+  source_url 'http://http.debian.net/debian/pool/main/n/nss-mdns/nss-mdns_0.14.1.orig.tar.gz'
+  source_sha256 'a2094101b735cade45048764ea594bdae2bfa9399837f3c852a5b264416e9c8c'
+
+  binary_url ({
+    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/nss_mdns-0.14.1-chromeos-armv7l.tar.xz',
+     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/nss_mdns-0.14.1-chromeos-armv7l.tar.xz',
+       i686: 'https://dl.bintray.com/chromebrew/chromebrew/nss_mdns-0.14.1-chromeos-i686.tar.xz',
+     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/nss_mdns-0.14.1-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+    aarch64: 'f563823a9c3c3d9946900151e661977d35ba78e75a1e864e71bccceb66536810',
+     armv7l: 'f563823a9c3c3d9946900151e661977d35ba78e75a1e864e71bccceb66536810',
+       i686: '3d485296384622270f77e90f45ed7a1111aeaa55c8db2fff8bfc8d1790558a84',
+     x86_64: '9d1ef607505356407946f743b4bd09dc659a83d0b003c0c9eaf724277ccc0a84',
+  })
+
+  def self.build
+    system './configure',
+           "--prefix=#{CREW_PREFIX}",
+           "--libdir=#{CREW_LIB_PREFIX}"
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end