message: stabilize code_hash functions
diff: @@ -298,6 +298,19 @@ mod sys {
  pub fn seal_caller_is_origin() -> ReturnCode;
  + pub fn seal_set_code_hash(code_hash_ptr: Ptr32<[u8]>) -> ReturnCode;
  +
  + pub fn seal_code_hash(
  + account_id_ptr: Ptr32<[u8]>,
  + output_ptr: Ptr32Mut<[u8]>,
  + output_len_ptr: Ptr32Mut<u32>,
  + ) -> ReturnCode;
  +
  + pub fn seal_own_code_hash(
  + output_ptr: Ptr32Mut<[u8]>,
  + output_len_ptr: Ptr32Mut<u32>,
  + );
  +
  #[cfg(feature = "ink-debug")]
  pub fn seal_debug_message(str_ptr: Ptr32<[u8]>, str_len: u32) -> ReturnCode;
  @@ -358,19 +371,6 @@ mod sys {
  output_ptr: Ptr32Mut<[u8]>,
  ) -> ReturnCode;
  - pub fn seal_set_code_hash(code_hash_ptr: Ptr32<[u8]>) -> ReturnCode;
  -
  - pub fn seal_code_hash(
  - account_id_ptr: Ptr32<[u8]>,
  - output_ptr: Ptr32Mut<[u8]>,
  - output_len_ptr: Ptr32Mut<u32>,
  - ) -> ReturnCode;
  -
  - pub fn seal_own_code_hash(
  - output_ptr: Ptr32Mut<[u8]>,
  - output_len_ptr: Ptr32Mut<u32>,
  - );
  -
  pub fn seal_contains_storage(key_ptr: Ptr32<[u8]>) -> ReturnCode;
  pub fn seal_set_storage(
  