message: Added travis.yml steps to download Vulkan SDK in iOS build
diff: @@ -18,6 +18,10 @@ before_install:
  tar -xzf cmake-${CMAKE_VERSION}-Darwin-x86_64.tar.gz
  export PATH=$PWD/cmake-${CMAKE_VERSION}-Darwin-x86_64/CMake.app/Contents/bin:$PATH
  cmake --version
  + if [ "$IOS" = "true" ]; then
  + wget --no-check-certificate https://vulkan.lunarg.com/sdk/home#sdk/downloadConfirm/latest/mac/vulkan-sdk.tar.gz
  + tar -xzf vulkan-sdk.tar.gz
  + fi
  fi
  - |
  if [ "$TRAVIS_OS_NAME" = "linux" ]; then
  