[Bug go/81393] Bootstrap failure on s390x-linux while building libgo against recent glibc

[ian at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81393

--- Comment #16 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Thu Jul 20 22:03:26 2017
New Revision: 250402

URL: https://gcc.gnu.org/viewcvs?rev=250402&root=gcc&view=rev
Log:
        PR go/81393
syscall: don't use GETREGS/SETREGS on s390

They were removed in recent glibc.

This is a backport of https://golang.org/cl/48231 to earlier branches.
Define required type and constants in syscall package directly, don't
try to pull them from the system header files.

Modified:
    branches/gcc-7-branch/libgo/go/syscall/syscall_linux_s390.go
    branches/gcc-7-branch/libgo/go/syscall/syscall_linux_s390x.go