Add tests for grpc desc

Author: mightyguava

protoc-gen-go/testdata/Makefile

@@ -59,6 +59,7 @@ testbuild:	regenerate
 regenerate:
 	# Invoke protoc once to generate three independent .pb.go files in the same package.
 	protoc --go_out=. multi/multi1.proto multi/multi2.proto multi/multi3.proto
+	protoc --go_out=plugins=grpc:. grpc.proto
 
 #extension_test:	extension_test.$O
 #	$(LD) -L. -o $@ $<

protoc-gen-go/testdata/grpc.pb.go

@@ -31,7 +31,7 @@
 
 syntax = "proto3";
 
-package grpc.testing;
+package testdata;
 
 message SimpleRequest {
 }