Add libseccomp

packages/libseccomp.rb

+require 'package'
+
+class Libseccomp < Package
+  description 'The libseccomp library provides an easy to use, platform independent, interface to the Linux Kernel\'s syscall filtering mechanism.'
+  homepage 'https://github.com/seccomp/libseccomp'
+  version '2.3.2'
+  source_url 'https://github.com/seccomp/libseccomp/releases/download/v2.3.2/libseccomp-2.3.2.tar.gz'
+  source_sha256 '3ddc8c037956c0a5ac19664ece4194743f59e1ccd4adde848f4f0dae7f77bca1'
+
+
+  def self.build
+    system "./configure"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end