Merge pull request #427 from cstrouse/add-libarchive

Add libarchive (3.2.2) package

packages/libarchive.rb

+require 'package'
+
+class Libarchive < Package
+  version '3.2.2'
+  source_url 'http://www.libarchive.org/downloads/libarchive-3.2.2.tar.gz'
+  source_sha1 'ccf14e3b4ec7c6b242cf07062dd40e82a17485a5'
+
+  depends_on "acl"
+  depends_on "attr"
+  depends_on "lz4"
+
+  def self.build
+    system "./configure --prefix=/usr/local --disable-static"
+    system "make"
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install" 
+  end
+end