scripts: Mod helper generator for multiple files
scripts: Mod helper generator for multiple files

Added parsing of option, conditional file generation to helper file
generator.

Change-Id: Ia7c51d50fb1785f3002dc2868f98d8e384d0e36e

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