Add libxtrans

packages/libxtrans.rb

+require 'package'
+
+class Libxtrans < Package
+  description 'transpot library for the X window system'
+  homepage 'https://x.org'
+  version '1.3.5'
+  source_url 'https://www.x.org/archive/individual/lib/xtrans-1.3.5.tar.gz'
+  source_sha256 'b7a577c1b6c75030145e53b4793db9c88f9359ac49e7d771d4385d21b3e5945d'
+
+  def self.build
+    system "./configure"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end