fix broken link
fix broken link

R=rsc, iant
CC=go-dev
http://go/go-review/1019003

pombredanne/go-deleteme,tianon/debian-golang,nightlyone/golang,dsriram/golang,tv42/old-go,gnanderson/go,nightlyone/golang,tv42/old-go,tv42/old-go,tianon/debian-golang,nightlyone/golang,dsriram/golang,dsriram/golang,apparentlymart/golang,pombredanne/go-deleteme,bdwalton/debian-golang,tianon/debian-golang,tianon/debian-golang,bdwalton/debian-golang,pombredanne/go-deleteme,pombredanne/go-deleteme,h8liu/golang,ssrl/go,dsriram/golang,ssrl/go,gnanderson/go,gnanderson/go,dsriram/golang,tv42/old-go,gnanderson/go,nightlyone/golang,ssrl/go,tianon/debian-golang,apparentlymart/golang,h8liu/golang,bdwalton/debian-golang,tv42/old-go,apparentlymart/golang,bdwalton/debian-golang,apparentlymart/golang,h8liu/golang,dsriram/golang,ssrl/go,gnanderson/go,bdwalton/debian-golang,ssrl/go,pombredanne/go-deleteme,tv42/old-go,h8liu/golang,h8liu/golang,nightlyone/golang,apparentlymart/golang,apparentlymart/golang,bdwalton/debian-golang,gnanderson/go,tianon/debian-golang,tianon/debian-golang,tv42/old-go,h8liu/golang,apparentlymart/golang,ssrl/go,dsriram/golang,tianon/debian-golang,bdwalton/debian-golang,ssrl/go,bdwalton/debian-golang,h8liu/golang,pombredanne/go-deleteme,nightlyone/golang,pombredanne/go-deleteme,gnanderson/go,nightlyone/golang