Fix pointer storage class for spirv_assembly tessellation tests.

Fix pointer storage class for spirv_assembly tessellation tests.

This was a new validation rule in
https://github.com/KhronosGroup/SPIRV-Tools/commit/d7cd1203a42b850e38a42e3606b22f810f671a90.

Errors look like:

Validation FAILED: From SPIR-V spec, section 3.32.8 on OpVariable:
Its Storage Class operand must be the same as the Storage Class operand of the result type.
  %gl_PrimitiveID = OpVariable %_ptr_Output_int Input

Also update to latest spirv-tools.

Components: Vulkan
Affects: dEQP-VK.spirv_assembly.*
Change-Id: I14a10b936da36ddc572551b1bf5fc3c837a79fb8