Correct wording of comment about required flags
Correct wording of comment about required flags

The word "subset" is used when it should be "superset" instead.

GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator,GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator,GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator