graphics/vulkan-extension-layer: unbreak plist after 6d50e8b6ed88

Error: Missing: lib/libVkLayer_khronos_memory_decompression.so
Error: Missing: share/vulkan/explicit_layer.d/VkLayer_khronos_memory_decompression.json

https://github.com/KhronosGroup/Vulkan-ExtensionLayer/commit/550f3120bc4f