Add a phony target for mk2bp_remaining files.

Bug: 308452586
Test: m mk2bp_remaining; CIs
Change-Id: I3d9242db500232da281f148da6b8205ada0b72e2
diff --git a/core/Makefile b/core/Makefile
index d371fb8..54b967e 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -871,6 +871,9 @@
 $(call declare-1p-target,$(MK2BP_REMAINING_CSV))
 $(call dist-for-goals,droidcore-unbundled,$(MK2BP_REMAINING_CSV))
 
+.PHONY: mk2bp_remaining
+mk2bp_remaining: $(MK2BP_REMAINING_HTML) $(MK2BP_REMAINING_CSV)
+
 # -----------------------------------------------------------------
 # Modules use -Wno-error, or added default -Wall -Werror
 WALL_WERROR := $(PRODUCT_OUT)/wall_werror.txt