message: README.md: Need pkg-config on Linux
diff: @@ -34,9 +34,16 @@ Dawn provides several WebGPU building blocks:
  ## Building Dawn
  Dawn uses the Chromium build system and dependency management so you need to [install depot_tools] and add it to the PATH.
  -Then get the source as follows:
  -[install depots_tools]: http://commondatastorage.googleapis.com/chrome-infra-docs/flat/depot_tools/docs/html/depot_tools_tutorial.html#_setting_up
  +[install depot_tools]: http://commondatastorage.googleapis.com/chrome-infra-docs/flat/depot_tools/docs/html/depot_tools_tutorial.html#_setting_up
  +
  +On Linux you need to have the `pkg-config` command:
  +```sh
  +# Install pkg-config on Ubuntu
  +sudo apt-get install pkg-config
  +```
  +
  +Then get the source as follows:
  ```sh
  # Clone the repo as "dawn"
  