File fix-missing-include.patch of Package alure

--- a/include/main.h
+++ b/include/main.h
@@ -4,6 +4,8 @@
 #include "AL/alure.h"
 #include "alext.h"
 
+#include <unistd.h>
+
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif