Add smem package

Smem is a memory profiling tool that uses proportial set sizes to give a more
useful measurement of memory usage in virtual memory systems.

Tested as working on XE500C13-K01US.

packages/smem.rb

+require 'package'
+
+class Smem < Package
+  description 'A Linux memory reporting tool that uses proportional set size.'
+  homepage 'https://www.selenic.com/smem/'
+  version '1.4'
+  source_url 'https://www.selenic.com/smem/download/smem-1.4.tar.gz' 
+  source_sha256 '2ea9f878f4cf3c276774c3f7e2a41977a1f2d64f98d2dcb6a15f1f3d84df61ec'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  depends_on 'buildessential' => :build
+  depends_on 'python27'
+
+  def self.build
+    system 'make smemcap'
+  end
+
+  def self.install
+    system "install -Dm755 smem #{CREW_DEST_PREFIX}/bin/smem"
+    system "install -Dm755 smemcap #{CREW_DEST_PREFIX}/bin/smemcap"
+    system "install -Dm643 smem.8 #{CREW_DEST_PREFIX}/man/man8/smem.8"
+  end
+end