Add kakoune package (#2661)

* Add kakoune package

Kakoune is a text editor, similar to vim.
Official repo: https://github.com/mawww/kakoune
Official website: http://kakoune.org

* Fix kakoune package

Add PREFIX and DESTDIRA after every make invocation

packages/kakoune.rb

+require 'package'
+
+class Kakoune < Package
+  # TODO prebuild version
+  description 'mawww\'s experiment for a better code editor'
+  homepage 'http://kakoune.org/'
+  version 'v2018.09.04'
+  source_url 'https://github.com/mawww/kakoune/releases/download/v2018.09.04/kakoune-2018.09.04.tar.bz2'
+  source_sha256 '7a31c9f08c261c5128d1753762721dd7b7fe4bb4e9a3c368c9d768c72a1472e1'
+  
+  depends_on 'ncurses'  => :build
+  depends_on 'asciidoc' => :build
+  depends_on 'libxslt'  => :build
+
+  def self.build
+    Dir.chdir("src") do
+      system "make", "PREFIX=#{CREW_PREFIX}", "DESTDIR=#{CREW_DEST_DIR}", "debug=no"
+    end
+  end
+
+  def self.install
+    Dir.chdir("src") do
+      system "make", "install", "PREFIX=#{CREW_PREFIX}", "DESTDIR=#{CREW_DEST_DIR}", "debug=no"
+    end
+  end
+end