message: Add link to clang-format docs and Linux install instructions
diff: @@ -13,7 +13,9 @@ POLITE NOTE: We want to point out that running the benchmarks as described below
  XAIN requires the following tools to be installed:
  - [Python 3.6+](https://python.org/)
  -- clang-format v8+ (on macOS: `brew install clang-format`)
  +- [clang-format 8+](https://clang.llvm.org/docs/ClangFormat.html)
  + - Linux: `sudo apt install clang-format`
  + - macOS: `brew install clang-format`
  ### Clone Repository & Install XAIN
  