src: add race.bat

R=golang-dev, dave, alex.brainman
CC=golang-dev
https://codereview.appspot.com/7133064
syscall: (*Proc).Call should return nil error when no error occurs
Fixes issue 4686.

R=alex.brainman, rsc
CC=golang-dev
https://codereview.appspot.com/7174047
runtime: fix windows build

Fixes issue 4743.

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/7284044
cmd/go: run examples in source order, not name order

Add Order field to doc.Example and write doc comments there.

Fixes issue 4662.

R=golang-dev, iant
CC=golang-dev
https://codereview.appspot.com/7229071
lib9/main.c: don't show the crash dialog on windows
Fixes issue 3202. (Or rather, work around issue 3202)

R=alex.brainman, rsc
CC=golang-dev
https://codereview.appspot.com/7202053