flounder_lte: Add a few missing references for flounder_lte.

BUG: 15915560
Change-Id: I99fecaf88cfc0f30af13abd3f3ec35fda116c624
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 863e4b1..7a7b3e9 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -51,3 +51,4 @@
 $(call add-clean-step, rm -rf $(OUT_DIR)/buildcache/aosp_flounder)
 $(call add-clean-step, rm -rf $(OUT_DIR)/target/product/flounder)
 $(call add-clean-step, rm -rf $(OUT_DIR)/buildcache/aosp_flounder)
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/product/flounder_lte)