Add p7zip (16.02) package

7-Zip  is  a  file archiver with the highest compression ratio. The
program supports 7z (that implements LZMA compression algorithm), ZIP,
CAB, ARJ, GZIP, BZIP2, TAR, CPIO, RPM and DEB formats. Compression
ratio in the new 7z format is 30-50% better than ratio in ZIP format.

Tested as working on Samsung XE50013-K01US.

packages/p7zip.rb

+require 'package'
+
+class P7zip < Package
+  version '16.02'
+  source_url 'http://downloads.sourceforge.net/p7zip/p7zip_16.02_src_all.tar.bz2'
+  source_sha1 'e8819907132811aa1afe5ef296181d3a15cc8f22'
+
+  def self.build
+    system "cp", "makefile.linux_any_cpu", "makefile.machine"
+    system "make", "all3"
+  end
+
+  def self.install
+    system "make", "DEST_DIR=#{CREW_DEST_DIR}", "install" 
+  end
+end