[PATCH 4/9] libstdc++ changes for ia16

[Jonathan Wakely]

On 01/04/17 17:48 +0100, Andrew Jenner wrote:
>	* src/c++11/cow-stdexcept.cc (_ITM_RU2): Declare.
>	(txnal_read_ptr): Allow 16-bit pointers.
>	* src/c++11/codecvt.cc (read_utf8_code_point): Handle 16-bit int.

OK for Stage 1, thanks.