We have to use := instead of +=
If we use +=, the right side may be deferred to evaluate,
if that target-specific variable is not defined yet.
That's a mistke.
Change-Id: I1635ee4791473f407866e010d612948c02cdebf6
diff --git a/core/base_rules.mk b/core/base_rules.mk
index c04d35d..baa8932 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -434,7 +434,7 @@
###########################################################
cleantarget := clean-$(LOCAL_MODULE)
$(cleantarget) : PRIVATE_MODULE := $(LOCAL_MODULE)
-$(cleantarget) : PRIVATE_CLEAN_FILES += \
+$(cleantarget) : PRIVATE_CLEAN_FILES := \
$(LOCAL_BUILT_MODULE) \
$(LOCAL_INSTALLED_MODULE) \
$(intermediates)