Initial checkin of gRPC to third_party/

third_party/grpc/examples/ruby/grpc-demo.gemspec

+# -*- ruby -*-
+# encoding: utf-8
+
+Gem::Specification.new do |s|
+  s.name          = 'grpc-demo'
+  s.version       = '0.11.0'
+  s.authors       = ['gRPC Authors']
+  s.email         = 'temiola@google.com'
+  s.homepage      = 'https://github.com/grpc/grpc'
+  s.summary       = 'gRPC Ruby overview sample'
+  s.description   = 'Simple demo of using gRPC from Ruby'
+
+  s.files         = `git ls-files -- ruby/*`.split("\n")
+  s.executables   = `git ls-files -- ruby/greeter*.rb ruby/route_guide/*.rb`.split("\n").map do |f|
+    File.basename(f)
+  end
+  s.require_paths = ['lib']
+  s.platform      = Gem::Platform::RUBY
+
+  s.add_dependency 'grpc', '~> 0.11'
+
+  s.add_development_dependency 'bundler', '~> 1.7'
+end