Add vendor-bootconfig.img to target-files-package

INTERNAL_VENDOR_BOOTCONFIG_TARGET is a required dependency of
target-files-package so it can be built from a clean build.

Test: rm -rf out/target/product && m target-files-package
Bug: 190329824
Change-Id: I9873aee3c9fb303d2ad245b5433d13eb76ab55f9
diff --git a/core/Makefile b/core/Makefile
index 0f233a2..194e372 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -4772,6 +4772,7 @@
 ifdef BUILDING_VENDOR_BOOT_IMAGE
   $(BUILT_TARGET_FILES_PACKAGE): $(INTERNAL_VENDOR_RAMDISK_FILES)
   $(BUILT_TARGET_FILES_PACKAGE): $(INTERNAL_VENDOR_RAMDISK_FRAGMENT_TARGETS)
+  $(BUILT_TARGET_FILES_PACKAGE): $(INTERNAL_VENDOR_BOOTCONFIG_TARGET)
   # The vendor ramdisk may be built from the recovery ramdisk.
   ifeq (true,$(BOARD_MOVE_RECOVERY_RESOURCES_TO_VENDOR_BOOT))
     $(BUILT_TARGET_FILES_PACKAGE): $(INTERNAL_RECOVERY_RAMDISK_FILES_TIMESTAMP)