use random() if we don't have arc4random()

lib/asn1/check-der.c

@@ -1102,7 +1102,11 @@ static void
 asn1rand(uint8_t *rand, size_t len)
 {
     while (len) {
+#ifdef HAVE_ARC4RANDOM
 	*rand++ = arc4random();
+#else
+	*rand++ = random();
+#endif
 	len--;
     }
 }