[bootstrap] Allow unqualified subdirs (#2536)
[bootstrap] Allow unqualified subdirs (#2536)

[bootstrap] Allow unqualified subdirs
dra27/jbuilder,janestreet/jbuilder,janestreet/jbuilder,dra27/jbuilder,janestreet/jbuilder,janestreet/jbuilder,dra27/jbuilder,dra27/jbuilder,dra27/jbuilder,janestreet/jbuilder,janestreet/jbuilder,dra27/jbuilder