Add regex_opt package

packages/regex_opt.rb

+require 'package'
+
+class Regex_opt < Package
+  description 'Perl-compatible regular expression optimizer'
+  homepage 'https://bisqwit.iki.fi/source/regexopt.html'
+  version '1.2.4'
+  source_url 'https://bisqwit.iki.fi/src/arch/regex-opt-1.2.4.tar.gz'
+  source_sha256 '128c8ba9570b1fd8a6a660233de2f5a4022740bc5ee300300709c3894413883f'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  def self.build
+    system "sed -i 's,PREFIX=/usr/local,PREFIX=#{CREW_PREFIX},' Makefile"
+    system "make"
+  end
+
+  def self.install
+    system "install -Dm755 regex-opt #{CREW_DEST_PREFIX}/bin/regex-opt"
+  end
+end