layers: Move SOVERSION to version 1.0.29
layers: Move SOVERSION to version 1.0.29

Change-Id: Ieb1befd5370d96404af8abf85bfed30fe43b5995

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