Add print_i64 to generated spec tests

82a613d added `print_i64` to the standalone test files, but not to the ones generated by the spec interpreter.

Author: gahaas

interpreter/script/js.ml

@@ -37,6 +37,7 @@ let spectest = {
   eq_funcref: eq_funcref,
   print: console.log.bind(console),
   print_i32: console.log.bind(console),
+  print_i64: console.log.bind(console),
   print_i32_f32: console.log.bind(console),
   print_f64_f64: console.log.bind(console),
   print_f32: console.log.bind(console),