Restore class that is still in use

buildSrc/src/main/java/org/elasticsearch/gradle/test/JNAKernel32Library.java

@@ -0,0 +1,25 @@
+package org.elasticsearch.gradle.test;
+
+import com.sun.jna.Native;
+import com.sun.jna.WString;
+import org.apache.tools.ant.taskdefs.condition.Os;
+
+public class JNAKernel32Library {
+
+    private static final class Holder {
+        private static final JNAKernel32Library instance = new JNAKernel32Library();
+    }
+
+    static JNAKernel32Library getInstance() {
+        return Holder.instance;
+    }
+
+    private JNAKernel32Library() {
+        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
+            Native.register("kernel32");
+        }
+    }
+
+    native int GetShortPathNameW(WString lpszLongPath, char[] lpszShortPath, int cchBuffer);
+
+}