8002273: NMT to report JNI memory leaks when -Xcheck:jni is on Summary: Allows NMT to report that JNI thread failed to detach from JVM before exiting, which leaks the JavaThread object when check:jni option is on. Reviewed-by: acorn, dholmes, coleenp, ctornqvi

// I can cast any old thing I want to this type object:
public class You_Have_Been_P0wned {
  // Make a bunch of int-fields so I can peek & poke it
  int _a;
  int _b;
  int _c;
  int _d;

}