loader: Need to use ICD's GetDeviceProcAddr
loader: Need to use ICD's GetDeviceProcAddr

The loader_GetDeviceProcAddr is the terminator
for the CreateDevice chain. It needs to call the ICD's
GetDeviceProcAddr to get the correct function pointer
not the object's current dispatch table that points
at the beginning of the chain.
Saw issue when running cube with only DRAW_STATE layer
enabled.

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