layers: MR159, Collect offsets of instructions producing constants
layers: MR159, Collect offsets of instructions producing constants

We're about to need to be able to look these up by <id> for proper array size
handling.

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