demos: Simplify vulkaninfo to not enable any extensions.
demos: Simplify vulkaninfo to not enable any extensions.

For the Linux WSI surface extensions  where BOTH ICD and loader support is
needed for an extension to be supported there was an issue.  If ICD supported
extensions was not equal to loader supported extensions vulkaninfo would error
exit.

Change-Id: Ib6e07d92491b04b1fb90cbf1c6793ae766944d50

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools