Add simple API test, syslog() no call to openlog()

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

test/api.c

@@ -0,0 +1,14 @@
+#include <stdlib.h>
+#include "syslog.h"
+
+int main(void)
+{
+	char *msg = getenv("MSG");
+
+	if (!msg)
+		return 1;
+
+	syslog(LOG_ERR, msg);
+
+	return 0;
+}