move coreaudio libraries to coreaudio selection

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-Id: 
diff --git a/configure b/configure
index 551b626..5305579 100755
--- a/configure
+++ b/configure
@@ -1015,7 +1015,11 @@
         "pa_simple *s = NULL; pa_simple_free(s); return 0;"
     ;;
 
-    oss|sdl|core|wav|dsound)
+    coreaudio)
+      libs_softmmu="-framework CoreAudio $libs_softmmu"
+    ;;
+
+    oss|sdl|wav|dsound)
     # XXX: Probes for CoreAudio, DirectSound, SDL(?)
     ;;