go.tools/go/gcimporter: fix build by adjusting test to new print output
go.tools/go/gcimporter: fix build by adjusting test to new print output

R=adonovan, bradfitz
CC=golang-dev
https://golang.org/cl/26430049

argandas/tools,josharian/tools,maddyonline/tools,magiccao/tools,golang/tools,runcom/tools,dmitris/tools,springning/tools,magiccao/tools,glasser/golang-tools,josharian/tools,springning/tools,cw2018/tools,nicot/tools,4ad/tools,syreclabs/go-tools,springning/tools,nicot/tools,sshetty10/tools,matryer/tools,runcom/tools,syreclabs/go-tools,cmars/tools,matryer/tools,glasser/golang-tools,4ad/tools,cw2018/tools,maddyonline/tools,magiccao/tools,josharian/tools,dmitris/tools,golang/tools,sshetty10/tools,syreclabs/go-tools,maddyonline/tools,jdhenke/tools,golang/tools,argandas/tools,dmitris/tools,sshetty10/tools,glasser/golang-tools,cw2018/tools,dmitris/tools,jdhenke/tools,golang/tools,syreclabs/go-tools,magiccao/tools,cmars/tools,cw2018/tools,golang/tools,syreclabs/go-tools,jdhenke/tools,josharian/tools,nicot/tools,argandas/tools,runcom/tools,matryer/tools,sshetty10/tools,nicot/tools,cmars/tools,jdhenke/tools,matryer/tools,glasser/golang-tools,argandas/tools,cmars/tools,syreclabs/go-tools,4ad/tools,springning/tools,runcom/tools,maddyonline/tools