ocarina: Print out the correct version

I should print out the value returned by vers_str(), rather than
hardcoding in "5.0"

ocarina/ocarina.cpp

@@ -47,7 +47,7 @@ void ocarina_quit()
 
 int main(int argc, char **argv)
 {
-	println("Ocarina 5.0");
+	println("Ocarina " + vers_str());
 
 	libsaria_init(argc, argv);
 	setup_callbacks();