message: Add OpName before OpModuleProcessed
  The SPIR-V spec requires OpName comes before any OpModuleProcessed.
  Fixes a SPIR-V validation error on the generated PostVS shader if the
  original shader has any OpModuleProcessed.
diff: @@ -314,11 +314,18 @@ void SPIRVEditor::SetName(uint32_t id, const char *name)
  SPIRVOperation op(spv::OpName, uintName);
  - size_t offset = sections[SPIRVSection::Debug].endOffset;
  + SPIRVIterator it;
  - spirv.insert(spirv.begin() + offset, op.begin(), op.end());
  - RegisterOp(SPIRVIterator(spirv, offset));
  - addWords(offset, op.size());
  + // OpName must be before OpModuleProcessed.
  + for(it = Begin(SPIRVSection::Debug); it < End(SPIRVSection::Debug); ++it)
  + {
  + if(it.opcode() == spv::OpModuleProcessed)
  + break;
  + }
  +
  + spirv.insert(spirv.begin() + it.offs(), op.begin(), op.end());
  + RegisterOp(SPIRVIterator(spirv, it.offs()));
  + addWords(it.offs(), op.size());
  }
  void SPIRVEditor::AddDecoration(const SPIRVOperation &op)
  