Create Graphics tests for OpName

Create Graphics tests for OpName

These tests make sure that OpName has no impact on the semantics of
graphics kernels. Note that the vertex shader template
(makeVertexShaderAssembly) changes %main to %BP_main.

New tests:
dEQP-VK.spirv_assembly.instruction.graphics.opname.*

Components: Vulkan

VK-GL-CTS issue: 936
VK-GL-CTS public issue: 76

Change-Id: I2c15b9a8cc9d1482548c32bf7f1acf8d02fc2e89