Update SPIRV-Headers
Update SPIRV-Headers

The SPIRV-Headers version for vulkan-cts-1.2.6 was ahead of 1.2.7. This
change brings SPIRV-Headers in 1.2.7 up to the same version.

Components: Vulkan
Change-Id: Ifff93c5251183d3a6ee3ef3f508e88274332116f

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