etcdserver: fix proto import paths

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

etcdserver/api/v3election/v3electionpb/v3election.proto

@@ -3,7 +3,7 @@ package v3electionpb;
 
 import "gogoproto/gogo.proto";
 import "etcd/etcdserver/etcdserverpb/rpc.proto";
-import "etcd/internal/mvcc/mvccpb/kv.proto";
+import "etcd/mvcc/mvccpb/kv.proto";
 
 // for grpc-gateway
 import "google/api/annotations.proto";

etcdserver/etcdserverpb/rpc.proto

@@ -2,8 +2,8 @@ syntax = "proto3";
 package etcdserverpb;
 
 import "gogoproto/gogo.proto";
-import "etcd/internal/mvcc/mvccpb/kv.proto";
-import "etcd/internal/auth/authpb/auth.proto";
+import "etcd/mvcc/mvccpb/kv.proto";
+import "etcd/auth/authpb/auth.proto";
 
 // for grpc-gateway
 import "google/api/annotations.proto";