Add externalAnnotations ant test and ant-1.8

compiler/integration-tests/testData/externalAnnotations/root1/j/Java.java

@@ -0,0 +1,20 @@
+package j;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.String;
+import java.lang.System;
+
+public class Java {
+    public String f() {
+        return "Java";
+    }
+
+    public String f2() {
+        return "Hello";
+    }
+
+    public static void main(String[] args) {
+        hello.HelloPackage.main(new String[] {});
+    }
+}