docs: Update build dependencies
docs: Update build dependencies

libx11-xcb-dev is used by WSI-Window.
libx11-xcb-dev depends on libx11-dev and libxcb1-dev.
So, installing libx11-xcb-dev will install all three.

Change-Id: Id3909919bbd48794df2fcad10b67ea3f8dbb203f

KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers