Symlink dirs that are tag- or host-specific
Symlink dirs that are tag- or host-specific

The original `SYMLINK_DIRS` pull request had ignored the tag- and
host-specific sections. This brings them back into being.

tejasmanohar/rcm,ali/rcm,tejasmanohar/rcm,thoughtbot/rcm,zachlatta/rcm,fgandellini/rcm,fgandellini/rcm,devm33/rcm,zachlatta/rcm,Frost/rcm,devm33/rcm,zachlatta/rcm,thoughtbot/rcm,tejasmanohar/rcm,TheLinuxKitten/rcm,ali/rcm,devm33/rcm,devm33/rcm,TheLinuxKitten/rcm,tejasmanohar/rcm,Frost/rcm,zachlatta/rcm,fgandellini/rcm,fgandellini/rcm,ali/rcm,TheLinuxKitten/rcm,Frost/rcm,ali/rcm,TheLinuxKitten/rcm,thoughtbot/rcm,Frost/rcm