Add zile package

Zile is a small, fast clone of Emacs.

Tested as working on Samsung Chromebook Plus (aarch64).

packages/zile.rb

@@ -0,0 +1,31 @@
+require 'package'
+
+class Zile < Package
+  description 'A small, fast, and powerful Emacs clone'
+  homepage 'http://www.gnu.org/software/zile/'
+  version '2.4.14'
+  source_url 'https://ftp.gnu.org/gnu/zile/zile-2.4.14.tar.gz'
+  source_sha256 '7a78742795ca32480f2bab697fd5e328618d9997d6f417cf1b14e9da9af26b74'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  depends_on 'acl'
+  depends_on 'bdwgc'
+  depends_on 'help2man' => :build
+  depends_on 'ncurses'
+
+  def self.build
+    system "./configure",
+	    "CPPFLAGS=-I#{CREW_PREFIX}/include/ncurses -I#{CREW_PREFIX}/include/ncursesw",
+	    "--prefix=#{CREW_PREFIX}",
+	    '--disable-dependency-tracking'
+    system 'make'
+  end
+
+  def self.install
+    system 'make', "DESTDIR=#{CREW_DEST_DIR}", 'install'
+  end
+end