Add simple kyua tests for the mod* system calls.

[jhb]

Summary

Obtained from: CheriBSD
Sponsored by: University of Cambridge, Google, Inc.

[vangyzen]

tests/sys/kern/module_test.c

46

==

There are four instances of errno = EFOO in this file.

tests/sys/kern/Makefile

 #endif
 
 #define muge_warn_printf(sc, fmt, args...) \
         device_printf((sc)->sc_ue.ue_dev, "warning: " fmt, ##args)
 
 #define muge_err_printf(sc, fmt, args...) \
         device_printf((sc)->sc_ue.ue_dev, "error: " fmt, ##args)
 
-#define ETHER_IS_ZERO(addr) \
-        (!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]))
-
 #define ETHER_IS_VALID(addr) \
         (!ETHER_IS_MULTICAST(addr) && !ETHER_IS_ZERO(addr))
 
 /* USB endpoints. */
 
 enum {
         MUGE_BULK_DT_RD,
         MUGE_BULK_DT_WR,

tests/sys/kern/module_test.c

 #endif
 
 #define muge_warn_printf(sc, fmt, args...) \
         device_printf((sc)->sc_ue.ue_dev, "warning: " fmt, ##args)
 
 #define muge_err_printf(sc, fmt, args...) \
         device_printf((sc)->sc_ue.ue_dev, "error: " fmt, ##args)
 
-#define ETHER_IS_ZERO(addr) \
-        (!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]))
-
 #define ETHER_IS_VALID(addr) \
         (!ETHER_IS_MULTICAST(addr) && !ETHER_IS_ZERO(addr))
 
 /* USB endpoints. */
 
 enum {
         MUGE_BULK_DT_RD,
         MUGE_BULK_DT_WR,