v1.1.3-rc8

• Fixed GitHub issue #195. Check if queue thread pointer is not NULL and if
  it is running before trying to join it.

• Fixed GitHub issue #205. Fixed NULL pointer dereference of queue in
  AsyncAppender code.

• Fixed SF#333. AsyncAppender's appenders need to be closed so that
  accumulated logs get flushed onto disk.

• Updated android.toolchain.cmake from OpenCV.

• Fixed GitHub issue #215. Mark ~HierarchyLocker() with noexcept(false)
  to avoid unlikely but possible terminate() call and a warning message
  during compilation.

• Disabled TLS support for iOS.

• Do not use language level thread-local storage on Cygwin. (GCC PR64697).

• Allow filters cofiguration in AsyncAppender. (suggested in SF#297 by
  Markus von Arx)

• Handle SocketBuffer overflow by throwing exception.
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