Remove generated file if compiling the image failed.

Change-Id: Ie809ad15d090e8303ec6ce308f76fc7f3f80cadd
diff --git a/build/Android.oat.mk b/build/Android.oat.mk
index 4762e4d..9fe3807 100644
--- a/build/Android.oat.mk
+++ b/build/Android.oat.mk
@@ -196,7 +196,7 @@
 	  --base=$$(LIBART_IMG_TARGET_BASE_ADDRESS) --instruction-set=$$($(3)TARGET_ARCH) \
 	  --instruction-set-features=$$($(3)TARGET_INSTRUCTION_SET_FEATURES) \
 	  --android-root=$$(PRODUCT_OUT)/system --include-patch-information \
-	  $$(PRIVATE_CORE_COMPILE_OPTIONS)
+	  $$(PRIVATE_CORE_COMPILE_OPTIONS) || (rm $$(PRIVATE_CORE_OAT_NAME); exit 1)
 
 $$(core_oat_name): $$(core_image_name)