Add owl package

Owl is a purely functional implementation of Scheme.

Tested as working on Samsung Chromebook Plus (ARMv8).

packages/owl.rb

+require 'package'
+
+class Owl < Package
+  description 'Owl Lisp is a functional dialect of the Scheme programming language.'
+  homepage 'https://haltp.org/n/owl'
+  version '0.1.14'
+  source_url 'https://github.com/aoh/owl-lisp/archive/v0.1.14.tar.gz'
+  source_sha256 '4d9982da3582456d1e769e25a7d0b2daefe859c45e262c8f56f794114f9a29a0'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  def self.build
+    system 'make', "PREFIX=#{CREW_PREFIX}"
+  end
+
+  def self.install
+    system 'make', "PREFIX=#{CREW_PREFIX}", "DESTDIR=#{CREW_DEST_DIR}", 'install'
+  end
+end