Add RouteGuideClient to tests’ Podfile

src/objective-c/tests/Podfile

@@ -4,6 +4,7 @@ platform :ios, '8.0'
 pod 'gRPC', :path => "../../.."
 pod 'Protobuf', :git => 'https://github.com/google/protobuf.git'
 pod 'RemoteTest', :path => "../generated_libraries/RemoteTestClient"
+pod 'Route_guide', :path => "../generated_libraries/RouteGuideClient"
 
 link_with 'AllTests'