[release-branch.go1.2] plan9: correct create permissions with union directory

««« CL 15360045 / f257b02e7ffe
plan9: correct create permissions with union directory

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/15360045

»»»

R=golang-dev
CC=golang-dev
https://golang.org/cl/19960046

lib/codereview/codereview.py

@@ -65,7 +65,7 @@ from mercurial import util as hg_util
 if os.sys.platform == 'plan9':
 	try:
 		import plan9
-		n = plan9.bind(os.path.expanduser("~/lib"), os.path.expanduser("~"), plan9.MBEFORE)
+		n = plan9.bind(os.path.expanduser("~/lib"), os.path.expanduser("~"), plan9.MBEFORE|plan9.MCREATE)
 	except ImportError:
 		pass