Add gem for mettle

This adds the gem for the mettle binaries, which contains reflective
payloads for a variety of Linux architectures (and more OSs in the
future)

Gemfile.lock

@@ -16,6 +16,7 @@ PATH
       metasploit-model
       metasploit-payloads (= 1.1.12)
       metasploit_data_models
+      metasploit_payloads-mettle
       msgpack
       network_interface
       nokogiri
@@ -162,6 +163,7 @@ GEM
       postgres_ext
       railties (~> 4.2.6)
       recog (~> 2.0)
+    metasploit_payloads-mettle (0.0.3)
     method_source (0.8.2)
     mime-types (3.0)
       mime-types-data (~> 3.2015)

lib/rex/post/meterpreter.rb

@@ -1,5 +1,6 @@
 # -*- coding: binary -*-
 
 require 'metasploit-payloads'
+require 'metasploit_payloads/mettle'
 require 'rex/post/meterpreter/client'
 require 'rex/post/meterpreter/ui/console'

metasploit-framework.gemspec

@@ -71,6 +71,8 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'metasploit-model'
   # Needed for Meterpreter
   spec.add_runtime_dependency 'metasploit-payloads', '1.1.12'
+  # Needed for the next-generation POSIX Meterpreter
+  spec.add_runtime_dependency 'metasploit_payloads-mettle'
   # Needed by msfgui and other rpc components
   spec.add_runtime_dependency 'msgpack'
   # get list of network interfaces, like eth* from OS.