Add package for socat (1.7.3.1)

socat is a multipurpose relay tool. Tested sucessfully on Samsung Chromebook 3 (XE500C13-K01US).

packages/socat.rb

+require 'package'
+
+class Socat < Package
+  version '1.7.3.1' 
+  source_url 'http://www.dest-unreach.org/socat/download/socat-1.7.3.1.tar.gz'
+  source_sha1 'a6f1d8ab3e85f565dbe172f33a9be6708dd52ffb'
+
+  depends_on 'readline'
+  depends_on 'openssl'
+
+  def self.build
+    system "./configure"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end