Make the packaging of VBOOT_SIGNER tools conditional.

Otherwise it may fail the targets that don't have
external/vboot_reference in the manifest.

Bug: 35467608
Test: lunch aosp_dragon-userdebug; m otatools-package
Test: lunch aosp_bullhead-userdebug; m otatools-package
Change-Id: I35700a4d7d0723992badcfb4a03be85d07a4b9a9
diff --git a/core/Makefile b/core/Makefile
index db1f873..04883dc 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1745,9 +1745,13 @@
   $(HOST_OUT_EXECUTABLES)/brillo_update_payload \
   $(HOST_OUT_EXECUTABLES)/lib/shflags/shflags \
   $(HOST_OUT_EXECUTABLES)/delta_generator \
-  $(BLK_ALLOC_TO_BASE_FS) \
+  $(BLK_ALLOC_TO_BASE_FS)
+
+ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT))
+OTATOOLS += \
   $(FUTILITY) \
   $(VBOOT_SIGNER)
+endif
 
 # Shared libraries.
 OTATOOLS += \
@@ -1786,12 +1790,15 @@
 $(BUILT_OTATOOLS_PACKAGE): $(OTATOOLS) | $(ACP)
 	@echo "Package OTA tools: $@"
 	$(hide) rm -rf $@ $(zip_root)
-	$(hide) mkdir -p $(dir $@) $(zip_root)/bin $(zip_root)/framework $(zip_root)/releasetools $(zip_root)/system/extras/verity $(zip_root)/external/vboot_reference/tests/devkeys
+	$(hide) mkdir -p $(dir $@) $(zip_root)/bin $(zip_root)/framework $(zip_root)/releasetools $(zip_root)/system/extras/verity
 	$(call copy-files-with-structure,$(OTATOOLS),$(HOST_OUT)/,$(zip_root))
 	$(hide) $(ACP) $(HOST_OUT_JAVA_LIBRARIES)/VeritySigner.jar $(zip_root)/framework/
 	$(hide) $(ACP) -p system/extras/verity/build_verity_metadata.py $(zip_root)/system/extras/verity/
-	$(hide) $(ACP) -p -r external/vboot_reference/tests/devkeys/* $(zip_root)/external/vboot_reference/tests/devkeys
 	$(hide) $(ACP) -r -d -p build/tools/releasetools/* $(zip_root)/releasetools
+ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT))
+	$(hide) mkdir -p $(zip_root)/external/vboot_reference/tests/devkeys
+	$(hide) $(ACP) -r -d -p external/vboot_reference/tests/devkeys/* $(zip_root)/external/vboot_reference/tests/devkeys
+endif
 	$(hide) rm -rf $@ $(zip_root)/releasetools/*.pyc
 	$(hide) (cd $(zip_root) && zip -qryX $(abspath $@) *)
 	$(hide) zip -qryX $(abspath $@) build/target/product/security/