include: Sync with GCC Bring changes from GCC in shared headers. 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.