message: Add naming check in transform feedback buffer.
  When using transform feedback buffer, the naming of input attributes and output attributes with same offset can be different. But the attributes with different offset should not use the same naming.
diff: @@ -428,6 +428,11 @@ impl RawProgram {
  {
  return false;
  }
  +
  +
  + if format.iter().any(|e| e.1 != elem.offset && e.0 == elem.name) {
  + return false;
  + }
  }
  true
  