svm: annotate Target_java_nio_DirectByteBuffer with @BasedOnJDKFile

Author: zapster

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/Target_java_nio_DirectByteBuffer.java

@@ -30,9 +30,11 @@
 import com.oracle.svm.core.annotate.RecomputeFieldValue;
 import com.oracle.svm.core.annotate.TargetClass;
 import com.oracle.svm.core.heap.Target_jdk_internal_ref_Cleaner;
+import com.oracle.svm.core.util.BasedOnJDKFile;
 import com.oracle.svm.core.util.VMError;
 
 @TargetClass(className = "java.nio.DirectByteBuffer")
+@BasedOnJDKFile("src/java.base/share/classes/java/nio/Direct-X-Buffer.java.template")
 public final class Target_java_nio_DirectByteBuffer {
 
     /**