apple: Redefine some additional clashing Mach types

While they usually are not included in a normal strongSwan build, the XPC
header indirectly defines these Mach types. To build charon-xpc, which uses
both XPC and strongSwan includes, we have to redefine these types.

src/libcharon/sa/task.h

@@ -22,6 +22,8 @@
 #ifndef TASK_H_
 #define TASK_H_
 
+#include <utils/utils.h>
+
 typedef enum task_type_t task_type_t;
 typedef struct task_t task_t;