Fix cts_testcase_config rule.

Bug: 21997856
Change-Id: I63af363f215a48430ca98e4968f9d37f40dea52e
diff --git a/core/base_rules.mk b/core/base_rules.mk
index efa084e..9c85e5b 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -611,7 +611,7 @@
 android_test_xml := $(wildcard $(LOCAL_PATH)/AndroidTest.xml)
 ifdef android_test_xml
 cts_testcase_config := $(COMPATIBILITY_TESTCASES_OUT_$(LOCAL_COMPATIBILITY_SUITE))/$(LOCAL_MODULE).config
-$(cts_testcase_config) : $(android_test_xml)
+$(cts_testcase_config) : $(android_test_xml) | $(ACP)
 	$(copy-file-to-new-target)
 endif