Add snd_pcm_hw_params_get/set_export_buffer()

Add snd_pcm_hw_params_get/set_export_buffer() API functions.
They control to ensure the buffer export to other processes.
If this flag is set, the local buffer of a plugin is exported over IPC shm.
Otherwise the buffer can be handled only locally (no shm).

Also fixed Version file for 1.0.9.

include/sound/asound.h

@@ -344,6 +344,7 @@ enum sndrv_pcm_hw_param {
 };
 
 #define SNDRV_PCM_HW_PARAMS_NORESAMPLE	(1<<0)  /* avoid rate resampling */
+#define SNDRV_PCM_HW_PARAMS_EXPORT_BUFFER	(1<<1)  /* export buffer */
 
 struct sndrv_interval {
 	unsigned int min, max;