bsd-user: Add target_uuid structure for uuidgen syscall

Add the target ABI definition for struct uuid, needed for uuidgen(2)
syscall emulation.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>

bsd-user/syscall_defs.h

@@ -483,6 +483,20 @@ struct target_procctl_reaper_kill {
     uint32_t rk_pad0[15];
 };
 
+/*
+ * sys/uuid.h
+ */
+#define TARGET_UUID_NODE_LEN    6
+
+struct target_uuid {
+    uint32_t    time_low;
+    uint16_t    time_mid;
+    uint16_t    time_hi_and_version;
+    uint8_t     clock_seq_hi_and_reserved;
+    uint8_t     clock_seq_low;
+    uint8_t     node[TARGET_UUID_NODE_LEN];
+};
+
 
 #define safe_syscall0(type, name) \
 type safe_##name(void) \