[New Package] libmd (#4905)

packages/libmd.rb

+require 'package'
+
+class Libmd < Package
+  description 'This library provides message digest functions found on BSD systems.'
+  homepage 'https://www.hadrons.org/software/libmd/'
+  version '1.0.3'
+  compatibility 'all'
+  source_url 'https://archive.hadrons.org/software/libmd/libmd-1.0.3.tar.xz'
+  source_sha256 '5a02097f95cc250a3f1001865e4dbba5f1d15554120f95693c0541923c52af4a'
+
+  def self.build
+    system "./configure #{CREW_OPTIONS}"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+
+  def self.check
+    system "make", "check"
+  end
+end