x/tools/dashboard/app: revert sub-repo path rename
x/tools/dashboard/app: revert sub-repo path rename

We're going to keep the old paths in the dashboard until
after Go 1.4 is out the door.

TBR=bradfitz
R=bradfitz
CC=golang-codereviews
https://golang.org/cl/169240044

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