Download and Configure reclient

1. Download: Download the reclient package from this link. This is a pre-built version of Google's reclient tool.
2. Extract: Extract the downloaded archive to a directory within your ROM's source tree. For example, you could create a directory called rbe in the root of your AOSP directory and extract it there. It is important to keep the extracted directory structure.
3. Note Path: Remember the relative path from your AOSP root to this directory (e.g., rbe) or the absolute path.