message: README: DroneCode -> DroneCore
diff: @@ -23,7 +23,7 @@ We suggest the following steps:
  git clone -b v1.6.x https://github.com/grpc/grpc
  cd grpc
  git submodule update --init
  - git apply wherever/DroneCode/grpc/0001-Makefile-fix-wrong-SHARED-version-suffix.patch
  + git apply <wherever>/DroneCore/grpc/0001-Makefile-fix-wrong-SHARED-version-suffix.patch
  make HAS_SYSTEM_PROTOBUF=false -j8
  make prefix=/opt/grpc install
  cd ..
  