Add OpSMod and OpSRem tests

Add OpSMod and OpSRem tests

New tests:
- dEQP-VK.spirv_assembly.instruction.compute.opsrem.positive
- dEQP-VK.spirv_assembly.instruction.compute.opsrem.all
- dEQP-VK.spirv_assembly.instruction.compute.opsmod.positive
- dEQP-VK.spirv_assembly.instruction.compute.opsmod.all
- dEQP-VK.spirv_assembly.instruction.graphics.srem.positive_*
- dEQP-VK.spirv_assembly.instruction.graphics.srem.all_*
- dEQP-VK.spirv_assembly.instruction.graphics.smod.positive_*
- dEQP-VK.spirv_assembly.instruction.graphics.smod.all_*

Fixes #520

Change-Id: I16fe1e920960b7537ef097952e48dcdcc9141246