fix link grpc on mac m1

[siyuan0322]

Fix building lgraph on M1 Mac.

The libgrpc.dylib should depend on libgpr.dylib, otherwise the linker would fail with message:

Undefined symbols for architecture arm64: "_gpr_assertion_failed", referenced from: Client::Stub::async::addVertices(grpc::ClientContext*, AddVerticesRequest const*, AddVerticesResponse*, grpc::ClientUnaryReactor*) in client.grpc.pb.cc.o Client::Stub::AsyncaddVerticesRaw(grpc::ClientContext*, AddVerticesRequest const&, grpc::CompletionQueue*) in client.grpc.pb.cc.o grpc::ClientAsyncResponseReader<AddVerticesResponse>::StartCall() in client.grpc.pb.cc.o Client::Stub::async::addEdges(grpc::ClientContext*, AddEdgesRequest const*, AddEdgesResponse*, grpc::ClientUnaryReactor*) in client.grpc.pb.cc.o Client::Stub::AsyncaddEdgesRaw(grpc::ClientContext*, AddEdgesRequest const&, grpc::CompletionQueue*) in client.grpc.pb.cc.o grpc::ClientAsyncResponseReader<AddEdgesResponse>::StartCall() in client.grpc.pb.cc.o Client::Stub::async::remoteFlush(grpc::ClientContext*, RemoteFlushRequest const*, RemoteFlushResponse*, grpc::ClientUnaryReactor*) in client.grpc.pb.cc.o ... "_gpr_free", referenced from: grpc::internal::CallOpSet<grpc::internal::CallOpSendInitialMetadata, grpc::internal::CallOpSendMessage, grpc::internal::CallOpRecvInitialMetadata, grpc::internal::CallOpRecvMessage<google::protobuf::MessageLite>, grpc::internal::CallOpClientSendClose, grpc::internal::CallOpClientRecvStatus>::FinalizeResult(void**, bool*) in client.grpc.pb.cc.o grpc::internal::CallOpClientRecvStatus::FinishOp(bool*) in client.grpc.pb.cc.o grpc::internal::CallOpSet<grpc::internal::CallOpSendInitialMetadata, grpc::internal::CallOpSendMessage, grpc::internal::CallOpClientSendClose, grpc::internal::CallOpRecvInitialMetadata, grpc::internal::CallNoOp<5>, grpc::internal::CallNoOp<6> >::FinalizeResult(void**, bool*) in client.grpc.pb.cc.o grpc::internal::CallOpSet<grpc::internal::CallOpSendInitialMetadata, grpc::internal::CallOpSendMessage, grpc::internal::CallOpClientSendClose, grpc::internal::CallOpRecvInitialMe

where these gpr_xxx is defined in libgpr.dylib

[codecov-commenter]

Codecov Report

Merging #2597 (64be439) into main (0d6bedb) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2597   +/-   ##
=======================================
  Coverage   39.90%   39.90%           
=======================================
  Files          88       88           
  Lines        9838     9838           
=======================================
  Hits         3926     3926           
  Misses       5912     5912           

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