message: stargate: Add OSX info to test vectors docs
diff: @@ -13,7 +13,7 @@ git clone https://github.com/CosmWasm/cosmos-sdk.git
  cd cosmos-sdk
  git checkout cosmjs-test-vectors
  -make build-simd-linux
  +make build-simd-linux # or on OSX: make build-simd-darwin
  # this takes a while to download a docker image and make a deterministic build....
  ls -l ./build/simd
  