godoc: fix path resolution for command-line one more time (sigh...)
godoc: fix path resolution for command-line one more time (sigh...)

R=rsc
CC=golang-dev
http://codereview.appspot.com/217058

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