Merge pull request #724 from uberhacker/add-valgrind-package

Add valgrind package

packages/valgrind.rb

+require 'package'
+
+class Valgrind < Package
+  description 'Valgrind is an instrumentation framework for building dynamic analysis tools.'
+  homepage 'http://valgrind.org/'
+  version '3.12.0'
+  source_url 'http://valgrind.org/downloads/valgrind-3.12.0.tar.bz2'
+  source_sha1 '7a6878bf998c60d1e377a4f22ebece8d9305bda4'
+
+  def self.build
+    system './configure'
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end