add target system.prop to be a prerequisite

diff --git a/core/Makefile b/core/Makefile
index 2da2313..a1f0109 100644 (file)
--- a/core/Makefile
+++ b/core/Makefile
@@ -109,7 +109,7 @@ $(word 3, 3, $(call default-locale, $(1)))
 endef
 
 BUILDINFO_SH := build/tools/buildinfo.sh
-$(INSTALLED_BUILD_PROP_TARGET): $(BUILDINFO_SH) $(INTERNAL_BUILD_ID_MAKEFILE)
+$(INSTALLED_BUILD_PROP_TARGET): $(BUILDINFO_SH) $(INTERNAL_BUILD_ID_MAKEFILE) $(wildcard $(TARGET_DEVICE_DIR)/system.prop)
        @echo Target buildinfo: $@
        @mkdir -p $(dir $@)
        $(hide) TARGET_BUILD_TYPE="$(TARGET_BUILD_VARIANT)" \