add dtbo support for ota

Test: make dist and locally push ota on a device
Change-Id: I920b98f20e248b437955b2a963eb69ed2ddb8d45
diff --git a/core/Makefile b/core/Makefile
index e20a5a2..8dca305 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2274,6 +2274,10 @@
 	$(hide) mkdir -p $(zip_root)/IMAGES
 	$(hide) cp $(INSTALLED_VENDORIMAGE_TARGET) $(zip_root)/IMAGES/
 endif
+ifdef BOARD_PREBUILT_DTBOIMAGE
+	$(hide) mkdir -p $(zip_root)/IMAGES
+	$(hide) cp $(INSTALLED_DTBOIMAGE_TARGET) $(zip_root)/IMAGES/
+endif
 	@# Run fs_config on all the system, vendor, boot ramdisk,
 	@# and recovery ramdisk files in the zip, and save the output
 	$(hide) $(call fs_config,$(zip_root)/SYSTEM,system/) > $(zip_root)/META/filesystem_config.txt