Merge "Docs: Adds validation-layer material to new Vulkan doc set" into mnc-docs am: b94ea2c am: d3867e5 am: 6adbc4d
am: 5c58a99

* commit '5c58a99dd314e3078400e9178916b68eca451220':
  Docs: Adds validation-layer material to new Vulkan doc set

Change-Id: I541213ffdf3341133973de6b82e6365d455e2132