go.tools/go/pointer: add test file missing from CL 112610043 (rev 32ae05502022)
go.tools/go/pointer: add test file missing from CL 112610043 (rev 32ae05502022)

TBR=gri
R=gri
CC=adg, golang-codereviews
https://golang.org/cl/111580043

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