fix links

README.md

@@ -95,7 +95,7 @@ messages are delivered in the order they were sent.
 
 #Protocol
 
-The [gRPC protocol](examples/PROTOCOL-HTTP2.md) specifies the abstract requirements for communication between
+The [gRPC protocol](doc/PROTOCOL-HTTP2.md) specifies the abstract requirements for communication between
 clients and servers. A concrete embedding over HTTP/2 completes the picture by
 fleshing out the details of each of the required operations.
 

doc/interop-test-descriptions.md

@@ -4,7 +4,7 @@ Interoperability Test Case Descriptions
 Client and server use
 [test.proto](https://github.com/grpc/grpc/blob/master/test/proto/test.proto)
 and the [gRPC over HTTP/2 v2
-protocol](examples/doc/PROTOCOL-HTTP2.md).
+protocol](doc/PROTOCOL-HTTP2.md).
 
 Client
 ------