Make OSULogger work on non-Darwin Swift!
Make OSULogger work on non-Darwin Swift!

Two new defines are needed to support the old interface,
which will go away in future commits:

- OSULOGGER_JSON_SUPPORT, once PMJSON is available elsewhere this
  conditional can be removed.
- OSULOGGER_ASYNC_SUPPORT, once libdispatch is available elsewhere
  this conditional can be removed.

hpux735/OSULogger,tienex/OSULogger,hpux735/OSULogger