Modify the version tag to be tool specific.

Perhaps we'll want to log the cli and runtime
gems to the same version in the future, but for
now let's let them vary, and not clash because
they're in the same repo now.

ruby-runtime/Rakefile

@@ -1,5 +1,10 @@
 require 'bundler'
-Bundler::GemHelper.install_tasks
+class Bundler::GemHelper
+  def version_tag
+    "runtime-v#{version}"
+  end
+  install_tasks
+end
 
 require 'rspec/core/rake_task'
 RSpec::Core::RakeTask.new(:spec)