Add ZBX_CPU_STATE_SPIN to monitor CP_SPIN

Index: src/libs/zbxsysinfo/openbsd/cpu.c
--- src/libs/zbxsysinfo/openbsd/cpu.c.orig
+++ src/libs/zbxsysinfo/openbsd/cpu.c
@@ -100,6 +100,8 @@ int	system_cpu_util(AGENT_REQUEST *request, AGENT_RESU
 		state = ZBX_CPU_STATE_IDLE;
 	else if (0 == strcmp(tmp, "interrupt"))
 		state = ZBX_CPU_STATE_INTERRUPT;
+	else if (0 == strcmp(tmp, "spin"))
+		state = ZBX_CPU_STATE_SPIN;
 	else
 	{
 		SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid second parameter."));
