Break apart oat writing times.

Change-Id: I11045e29dc58ed1efbd19070ec1dcafc1044c95a
diff --git a/compiler/image_test.cc b/compiler/image_test.cc
index e22e702..a8a9d2e 100644
--- a/compiler/image_test.cc
+++ b/compiler/image_test.cc
@@ -60,7 +60,7 @@
 
       ScopedObjectAccess soa(Thread::Current());
       OatWriter oat_writer(class_linker->GetBootClassPath(),
-                           0, 0, "", compiler_driver_.get());
+                           0, 0, "", compiler_driver_.get(), &timings);
       bool success = compiler_driver_->WriteElf(GetTestAndroidRoot(),
                                                 !kIsTargetBuild,
                                                 class_linker->GetBootClassPath(),