Update to use the canonical version of LB proto
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 89ddf20..7a52bae 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -782,6 +782,8 @@
'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_channel_secure.cc',
'src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.cc',
'src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.cc',
+ 'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/google/protobuf/duration.pb.c',
+ 'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/google/protobuf/timestamp.pb.c',
'src/core/ext/filters/client_channel/lb_policy/grpclb/proto/grpc/lb/v1/load_balancer.pb.c',
'src/core/ext/filters/client_channel/resolver/fake/fake_resolver.cc',
'src/core/ext/filters/client_channel/lb_policy/pick_first/pick_first.cc',