Added OpenAL-Soft 1.16.0.

libs/openal-soft/cmake/FindAudioIO.cmake

@@ -0,0 +1,21 @@
+# - Find AudioIO includes and libraries
+#
+#   AUDIOIO_FOUND        - True if AUDIOIO_INCLUDE_DIR is found
+#   AUDIOIO_INCLUDE_DIRS - Set when AUDIOIO_INCLUDE_DIR is found
+#
+#   AUDIOIO_INCLUDE_DIR - where to find sys/audioio.h, etc.
+#
+
+find_path(AUDIOIO_INCLUDE_DIR
+          NAMES sys/audioio.h
+          DOC "The AudioIO include directory"
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(AudioIO  REQUIRED_VARS AUDIOIO_INCLUDE_DIR)
+
+if(AUDIOIO_FOUND)
+    set(AUDIOIO_INCLUDE_DIRS ${AUDIOIO_INCLUDE_DIR})
+endif()
+
+mark_as_advanced(AUDIOIO_INCLUDE_DIR)