exp/inotify: fix data race in linux tests Fixes issue 2708.
exp/inotify: fix data race in linux tests
Fixes issue 2708.

R=golang-dev, bradfitz
CC=golang-dev, mpimenov
http://codereview.appspot.com/5543060

dsriram/golang,tv42/old-go,gnanderson/go,apparentlymart/golang,apparentlymart/golang,pombredanne/go-deleteme,apparentlymart/golang,tv42/old-go,tv42/old-go,apparentlymart/golang,dsriram/golang,tv42/old-go,tv42/old-go,apparentlymart/golang,gnanderson/go,tv42/old-go,apparentlymart/golang,gnanderson/go,pombredanne/go-deleteme,gnanderson/go,gnanderson/go,dsriram/golang,gnanderson/go,gnanderson/go,dsriram/golang,tv42/old-go,pombredanne/go-deleteme,dsriram/golang,dsriram/golang,dsriram/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme