Intel: Uniformscaling compilation error

[maleadt]

After #285, gpuarrays/uniformscaling started to fail on Intel. The reduced SPIR-V:

         %u2 = OpTypeInt 2 0
       %long = OpTypeInt 64 2
     %long_1 = OpConstant %long 1
          %4 = OpTypeFunction %long %long
  %_struct_5 = OpTypeStruct
%_ptr_Function__struct_5 = OpTypePointer Function %_struct_5
  %_struct_7 = OpTypeStruct
%_ptr_Function__struct_7 = OpTypePointer Function %_struct_7
          %9 = OpTypeFunction %_ptr_Function__struct_5 %u2
         %11 = OpFunction %10 None %4
         %12 = OpFunctionParameter %long
         %13 = OpLabel
         %14 = OpIAddCarry %long %long_1 %12
               OpBranch %15
               OpUnreachable
         %15 = OpLabel
         %16 = OpFunction %10 None %9
         %17 = OpFunctionParameter %_ptr_Function__struct_7
         %18 = OpLabel
         %20 = OpInBoundsPtrAccessChain %19 %17 %11

Build error at wip9.c:138:

error: undefined reference to `_Z17__spirv_IAddCarryll'
in function: '__spirv_IAddCarry(long, long)' called indirectly by at least one of the kernels.

error: backend compiler failed build.