[PATCH v2 0/8] MR9023: Draft: libs/fluidsynth: Miscellaneous fixes in glib stubs.

[Jinoh Kang (＠iamahuman)]

Mostly for vendoring of future fluidsynth versions.

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  v2: libs/fluidsynth: Use InterlockedExchangeAdd() in g_atomic_int_add().
      libs/fluidsynth: Return thread return value from g_thread_join().
      libs/fluidsynth: Fix definition of g_atomic_int_dec_and_test().
      libs/fluidsynth: Fix argument flag handling in g_file_test().
      libs/fluidsynth: Round up sleep duration in g_usleep().
      libs/fluidsynth: Use full memory barrier in g_atomic_int_get().
      libs/fluidsynth: Fix double close of thread handle in g_thread_unref().
      libs/fluidsynth: Fix g_mutex_init() and g_cond_init().

https://gitlab.winehq.org/wine/wine/-/merge_requests/9023