Generate an hprof file to test ahat.

This change sets up the infrastructure to write test cases for ahat
that make use of an hprof file automatically generated from a sample
program.

Change-Id: Id11f656afb69c96a26655cc4caeb745ad844f431
diff --git a/tools/ahat/test/Tests.java b/tools/ahat/test/Tests.java
index fb53d90..bab7121 100644
--- a/tools/ahat/test/Tests.java
+++ b/tools/ahat/test/Tests.java
@@ -22,6 +22,7 @@
   public static void main(String[] args) {
     if (args.length == 0) {
       args = new String[]{
+        "com.android.ahat.InstanceUtilsTest",
         "com.android.ahat.QueryTest",
         "com.android.ahat.SortTest"
       };