message: Disable unsupported type unit tests
diff: @@ -93,6 +93,8 @@ PrngTest.HundredValuesB10p1 POPLAR // U32
  PrngTest.HundredValuesB10p5U32 POPLAR // U32
  PrngTest.HundredValuesB10p1U32 POPLAR // U32
  VecOpsSimpleTest.NegateUint32Values POPLAR // U32
  +ConvertTest.ConvertR1U32ToR1F32 POPLAR // U32
  +ConvertTest.ConvertR1U32ToR1S64 POPLAR // U32
  ArrayElementwiseOpTest.NegConstantS64 POPLAR // S64
  ArrayElementwiseOpTest.SubTwoConstantS64s POPLAR // S64
  @@ -104,6 +106,7 @@ DynamicSliceTest.Int64R3 POPLAR // S64
  DynamicSliceTest.Int64R2 POPLAR // S64
  DynamicSliceTest.Int64R1 POPLAR // S64
  ScalarComputationsTest.CastS64ToF32 POPLAR // S64
  +ConvertTest.ConvertR1S64ToR1F32 POPLAR // S64
  ScalarComputationsTest.AddTwoScalarsU64 POPLAR // U64
  DynamicUpdateSliceTest.UInt64R3 POPLAR // U64
  