runtime/race: update runtime to r170112. This includes GORACE history_size and log_path flags.
runtime/race: update runtime to r170112.
This includes GORACE history_size and log_path flags.

This change is actually an addition to:
https://codereview.appspot.com/6947046

race_linux_amd64.syso somehow fall out of it.

R=minux.ma
CC=golang-dev
https://codereview.appspot.com/6946051

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang