syscall: ptrace fixes for s390

Fixes required now that we #include <linux/ptrace.h> in sysinfo.c.

Patch by Andreas Krebbel.

Change-Id: Iaaa5ff920df74965de318d54427494fa83a6225f
Reviewed-on: https://go-review.googlesource.com/46839
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 files changed