[New Package] libmpeg2 (#5236)

packages/libmpeg2.rb

+require 'package'
+
+class Libmpeg2 < Package
+  description 'A free MPEG-2 video stream decoder'
+  homepage 'https://libmpeg2.sourceforge.io/'
+  version '0.5.1'
+  compatibility 'all'
+  source_url 'https://libmpeg2.sourceforge.io/files/libmpeg2-0.5.1.tar.gz'
+  source_sha256 'dee22e893cb5fc2b2b6ebd60b88478ab8556cb3b93f9a0d7ce8f3b61851871d4'
+
+  depends_on 'libx11'
+  depends_on 'imake' => :build
+
+  def self.build
+    system "./configure #{CREW_OPTIONS} \
+            --with-x"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+
+  def self.check
+    system "make", "check"
+  end
+end