Change ddmc run-test to make new objects instead of strings.

Before, the test was creating new strings until overflowing allocations,
which was half string objects and half character arrays. Now, it
allocates all strings with the character data, which is larger than
before, causing the test to run out of memory. Allocating only objects
prevents the test from running out of memory.

Change-Id: Icf3f0fd2ae847e76a9b8d5dfb762be92de16aaa3
diff --git a/test/098-ddmc/src/Main.java b/test/098-ddmc/src/Main.java
index 962bd7f..f41ff2a 100644
--- a/test/098-ddmc/src/Main.java
+++ b/test/098-ddmc/src/Main.java
@@ -44,7 +44,7 @@
         System.out.println("Confirm when we overflow, we don't roll over to zero. b/17392248");
         final int overflowAllocations = 64 * 1024;  // Won't fit in unsigned 16-bit value.
         for (int i = 0; i < overflowAllocations; i++) {
-            new String("fnord");
+            new Object();
         }
         Allocations after = new Allocations(DdmVmInternal.getRecentAllocations());
         System.out.println("before < overflowAllocations=" + (before.numberOfEntries < overflowAllocations));