fetch_souces.py: cache extracted hash and only extract if necessary am: 30e2e7b423 am: bb1518d839 am: c62f0007f6 am: 8c45816a40
fetch_souces.py: cache extracted hash and only extract if necessary am: 30e2e7b423 am: bb1518d839 am: c62f0007f6
am: 8c45816a40

Change-Id: I5dacf457c9334ac34f20a34e1a508b9de456cf4f

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