Bug 1826553 - Fix incomplete JSONPrinter type error in release build r=arai

Differential Revision: https://phabricator.services.mozilla.com/D174776

js/src/jsapi-tests/testCompileScript.cpp

@@ -12,6 +12,7 @@
 #include "js/SourceText.h"                  // JS::Source{Ownership,Text}
 #include "jsapi-tests/tests.h"
 #include "vm/ErrorReporting.h"
+#include "vm/JSONPrinter.h"  // js::JSONPrinter
 
 using namespace JS;