Initial implementation of Vulkan SC CTS

Initial implementation of Vulkan SC CTS

This commit initiates Vulkan SC conformance tests suite.
Most important modifications:
- move existing Vulkan INL files from external/vulkancts/framework/vulkan to external/vulkancts/framework/vulkan/generated/vulkan
- add new set of INL files for Vulkan SC in a directory external/vulkancts/framework/vulkan/generated/vulkansc
- modify Python scripts so that they are able to generate both Vulkan and Vulkan SC INL files: external/vulkancts/scripts/gen*.py
- add Vulkan SC framework modules: vkscutil, vkscutilnoshader, tcutil-sc-platform
- add Vulkan SC modules required to create new executable deqp-vksc: deqp-vksc-package, deqp-vksc-util
- add module with first two tests for Vulkan SC: deqp-vksc-api
- add vulkan_sc_core.h file to directory external/vulkancts/scripts/src
- define new test case list for Vulkan SC
- CMake files cleanup

All above mentioned C++ modules ( executables, libraries ) use the same code as its Vulkan counterparts with CTS_USES_VULKAN and CTS_USES_VULKANSC flags added and different set of INL files.

New tests:

dEQP-VKSC.api.version_check.version
dEQP-VKSC.api.version_check.entry_points

Components: Vulkan VulkanSC Framework

Change-Id: I9d845a5ce321e3e734f5d33e2a430f1a3954a4ad