vulkaninfo: Add checks for some struct allocation
vulkaninfo: Add checks for some struct allocation

Added checks after attempted memory allocation in
AppGpuInit and before memory frees in
AppGpuDestroy.

Change-Id: Ie2c207bfabd24bec326b12eef0c58e2bdfe8b59a

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