[PATCH] include: Sync with GCC

[Nick Clifton]

Hi Simon,

> include/ChangeLog:
> 
> 	Sync with GCC
> 
> 	2018-05-24  Tom Rix  <trix@juniper.net>
> 
> 	* dwarf2.def (DW_FORM_strx*, DW_FORM_addrx*): New.
> 
> 	2017-11-20  Kito Cheng  <kito.cheng@gmail.com>
> 
> 	* longlong.h [__riscv] (__umulsidi3): Define.
> 	[__riscv] (umul_ppmm): Likewise.
> 	[__riscv] (__muluw3): Likewise.

Approved - please apply.

Cheers
  Nick