Add log to identify the source of the zip corruption.

This CL is to be reverted when debug is done.

Change-Id: I47f2464a4b32affe2d63f874a1df3f8f24e569d5
diff --git a/library/src/android/support/multidex/MultiDex.java b/library/src/android/support/multidex/MultiDex.java
index d9f164f..064c66a 100644
--- a/library/src/android/support/multidex/MultiDex.java
+++ b/library/src/android/support/multidex/MultiDex.java
@@ -266,6 +266,9 @@
                     new ArrayList<File>(additionalClassPathEntries), optimizedDirectory,
                     suppressedExceptions));
             if (suppressedExceptions.size() > 0) {
+                for (IOException e : suppressedExceptions) {
+                    Log.w(TAG, "Exception in makeDexElement", e);
+                }
                 Field suppressedExceptionsField =
                         findField(loader, "dexElementsSuppressedExceptions");
                 IOException[] dexElementsSuppressedExceptions =