use BOARD_PREBUILT_DTBOIMAGE in target-files-package

it's better to use the original $(BOARD_PREBUILT_DTBOIMAGE) instead
of AVB-padded $(INSTALLED_DTBOIMAGE_TARGET), the latter will be padded
to the size of /dtbo partition

Test: `make target-files-package` target file RECOVERY/recovery_dtbo is
    the original BOARD_PREBUILT_DTBOIMAGE
Test: `make otapackage` build pass and OTA file works fine

Change-Id: Iec8524d3a0544ddca89481dc613f076b36aeed25
diff --git a/core/Makefile b/core/Makefile
index cf8a51d..ecca965 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -3119,6 +3119,7 @@
 		$(INSTALLED_ANDROID_INFO_TXT_TARGET) \
 		$(INSTALLED_KERNEL_TARGET) \
 		$(INSTALLED_2NDBOOTLOADER_TARGET) \
+		$(BOARD_PREBUILT_DTBOIMAGE) \
 		$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_BASE_FS_PATH) \
 		$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_BASE_FS_PATH) \
 		$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_BASE_FS_PATH) \
@@ -3155,7 +3156,7 @@
 	$(hide) cp $(INSTALLED_2NDBOOTLOADER_TARGET) $(zip_root)/$(PRIVATE_RECOVERY_OUT)/second
 endif
 ifdef BOARD_INCLUDE_RECOVERY_DTBO
-	$(hide) cp $(INSTALLED_DTBOIMAGE_TARGET) $(zip_root)/$(PRIVATE_RECOVERY_OUT)/recovery_dtbo
+	$(hide) cp $(BOARD_PREBUILT_DTBOIMAGE) $(zip_root)/$(PRIVATE_RECOVERY_OUT)/recovery_dtbo
 endif
 ifdef INTERNAL_KERNEL_CMDLINE
 	$(hide) echo "$(INTERNAL_KERNEL_CMDLINE)" > $(zip_root)/$(PRIVATE_RECOVERY_OUT)/cmdline