Fix install location for vendor tests

Bug: 63393698
Test: m -j hidl_test_client; apply; m -j hidl_test_client
Change-Id: Ia54a8d2aaedd63ce1d70944ee69fda3b9fe223a9
diff --git a/CleanSpec.mk b/CleanSpec.mk
index b955e25..91f1a0b 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -420,6 +420,10 @@
 # Version checking moving to Soong
 $(call add-clean-step, rm -rf $(OUT_DIR)/versions_checked.mk)
 
+# Vendor tests were being installed into /vendor/bin accidentally
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/vendor/nativetest*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/vendor/nativetest*)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************