`lldb-private-types.h` includes `lldb-private.h`, which in turn includes
`lldb-private-types.h`. Because of that, `lldb-public.h` included by
`lldb-private.h` after `lldb-private-types.h` is not actually included.
The practical consequence of this is that types defined in
`lldb-public-types.h` (for example, `addr_t` needed downstream) are not
available in `lldb-private-types.h`.
Fix this by "including what you use", which is `lldb-types.h`.
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