Add dosbox_x package (#4081)

Add pre-built binaries

packages/dosbox_x.rb

+require 'package'
+
+class Dosbox_x < Package
+  description 'An x86 emulator with DOS.'
+  homepage 'https://dosbox-x.com/'
+  version '0.83.1'
+  #compatibility 'all'
+  source_url 'https://github.com/joncampbell123/dosbox-x/archive/dosbox-x-v0.83.1.tar.gz'
+  source_sha256 '222c6c4e2ec15bfab0e327b9ba4af92a3fcdd0ff76f1917529a11503ab4a2833'
+
+  binary_url ({
+    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/dosbox_x-0.83.1-chromeos-armv7l.tar.xz',
+     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/dosbox_x-0.83.1-chromeos-armv7l.tar.xz',
+       i686: 'https://dl.bintray.com/chromebrew/chromebrew/dosbox_x-0.83.1-chromeos-i686.tar.xz',
+     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/dosbox_x-0.83.1-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+    aarch64: '839c4fef89a682fd9bc7bc761b42a112b7bf9e8ab6e33febe37ca3a80ef58aaa',
+     armv7l: '839c4fef89a682fd9bc7bc761b42a112b7bf9e8ab6e33febe37ca3a80ef58aaa',
+       i686: '27a8b791fa8079e871ac68d58ae41e925b568b604659d063b4d3c7b32d578305',
+     x86_64: '28d8a38df1329b5059e81f84a37eafc155bfff5445bf3ded2eed8bc92e8d25b6',
+  })
+
+  depends_on 'ffmpeg'
+  depends_on 'libglu'
+  depends_on 'libpng'
+  depends_on 'libsdl'
+
+  def self.patch
+    system 'filefix'
+    system "sed -i 's,--prefix=/usr,#{CREW_OPTIONS},' build"
+  end
+
+  def self.build
+    system './build'
+  end
+
+  def self.install
+    system 'make', "DESTDIR=#{CREW_DEST_DIR}", 'install'
+  end
+
+  def self.postinstall
+    puts
+    puts "Type 'dosbox-x' to get started.".lightblue
+    puts
+  end
+end