scripts: Pass parameters to helper file generator
scripts: Pass parameters to helper file generator

The helper file generator will be used to output multiple helper
files. Added passing of parameter and test call for this feature
to the generator options block.

Change-Id: I1e417ff50628f395c589282ed6f96f0340758f23

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