message: core:vsx change behavior of v_round to rounding to nearest even
diff: @@ -832,10 +832,10 @@ OPENCV_HAL_IMPL_VSX_BIN_FUNC2(v_int64x2, v_uint64x2, vec_udword2_c, v_absdiff, v
  /** Rounding **/
  inline v_int32x4 v_round(const v_float32x4& a)
  -{ return v_int32x4(vec_cts(vec_round(a.val))); }
  +{ return v_int32x4(vec_cts(vec_rint(a.val))); }
  inline v_int32x4 v_round(const v_float64x2& a)
  -{ return v_int32x4(vec_mergesqo(vec_ctso(vec_round(a.val)), vec_int4_z)); }
  +{ return v_int32x4(vec_mergesqo(vec_ctso(vec_rint(a.val)), vec_int4_z)); }
  inline v_int32x4 v_floor(const v_float32x4& a)
  { return v_int32x4(vec_cts(vec_floor(a.val))); }
  