Add whiptail package

packages/whiptail.rb

+require 'package'
+
+class Whiptail < Package
+  description 'displays dialog boxes from shell scripts.'
+  homepage 'http://www.linuxfromscratch.org/blfs/view/cvs/general/newt.html'
+  version '0.52.20'
+  source_url 'https://releases.pagure.org/newt/newt-0.52.20.tar.gz'
+  source_sha256 '8d66ba6beffc3f786d4ccfee9d2b43d93484680ef8db9397a4fb70b5adbb6dbc'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  depends_on 'popt'
+  depends_on 'slang'
+
+  def self.build
+    system "./configure --prefix=#{CREW_PREFIX} --libdir=#{CREW_LIB_PREFIX}"
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end