scripts: Handle goofy unicode chars in spec.py
scripts: Handle goofy unicode chars in spec.py

Forward and backward double-quotes are now changed to standard
double-quote chars, and escaped as they are output in the DB.

Change-Id: Icbdc23262c8da0dd2441b028997a3f30d69d6834

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