Portability: fix osx target
Portability: fix osx target

Currently cts can be be build on MacOS using default target
this CL adds missing libraries also to osx target.

Components: Framework

VK-GL-CTS public issue: 277

Affects:
*

Change-Id: Ic890bea33bd90240e84dd71b985cf146a1a4df0c

KhronosGroup/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/VK-GL-CTS,KhronosGroup/Vulkan-CTS,KhronosGroup/Vulkan-CTS