Enable JSX transform in super_errors tests (rescript-lang#7048)

Author: cknitt

jscomp/build_tests/super_errors/input.js

@@ -11,7 +11,7 @@ const fixtures = fs
   .filter(fileName => path.extname(fileName) === ".res");
 
 // const runtime = path.join(__dirname, '..', '..', 'runtime')
-const prefix = `${bsc} -w +A`;
+const prefix = `${bsc} -w +A -bs-jsx 4 -bs-jsx-mode automatic`;
 
 const updateTests = process.argv[2] === "update";