rts: Allow profiling by closure type in prof way

Previously we inexplicably disabled support for `-hT` profiling in the profiled
way. Admittedly, there are relatively few cases where one would prefer -hT to
`-hd`, but the option should nevertheless be available for the sake of
consistency.

Note that this does mean that there is a bit of an inconsistency in the behavior
of `-h`: in the profiled way `-h` behaves like `-hc` whereas in the non-profiled
way it defaults to `-hT`.