cmd/godoc: add debug subrepo meta to x handler
cmd/godoc: add debug subrepo meta to x handler

Change-Id: I0ba56b32dd9b53d06817f9f7e2dafff04e6a86d2
Reviewed-on: https://go-review.googlesource.com/1565
Reviewed-by: David Symonds <7f6bb564ed9e580d4f0aa90d53b34578e5d24cb9@golang.org>

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