exp/eval test: fix build
exp/eval test: fix build

R=r
CC=golang-dev
http://codereview.appspot.com/1599043

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