Fix SPIRV validation for decoration tests

Fix SPIRV validation for decoration tests

The decoration matching tests were incorrectly using Flat and
NoPerspective decoration on vertex inputs. The validator has been
updated to catch these errors, so the tests now cause an InternalError.

Compoennts: Vulkan
VK-GL-CTS issue: 3895
Affects: dEQP-VK.spirv_assembly.instruction.graphics.cross_stage.basic_type.flat
         dEQP-VK.spirv_assembly.instruction.graphics.cross_stage.basic_type.no_perspective
         dEQP-VK.spirv_assembly.instruction.graphics.cross_stage.interface_blocks.flat
         dEQP-VK.spirv_assembly.instruction.graphics.cross_stage.interface_blocks.no_perspective

Change-Id: I818868ca87d15d068430e9721204be620b28e225