package: use /dev/null for apk --repositories-file

In preparation for APK version bump, use /dev/null instead of /dev/zero
for --repositories-file to mute an error in recent APK files.

New APK version use modern istream logic that are more sensible to the
kind of file passed and /dev/null is required to correctly handle an
empty repository file.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

include/image.mk

@@ -310,7 +310,7 @@ endef
 define Image/Manifest
 	$(if $(CONFIG_USE_APK), \
 		$(call apk,$(TARGET_DIR_ORIG)) list --quiet --manifest --no-network \
-			--repositories-file /dev/zero | sort | sed 's/ / - /'  > \
+			--repositories-file /dev/null | sort | sed 's/ / - /'  > \
 			$(BIN_DIR)/$(IMG_PREFIX)$(if $(PROFILE_SANITIZED),-$(PROFILE_SANITIZED)).manifest, \
 		$(call opkg,$(TARGET_DIR_ORIG)) list-installed > \
 			$(BIN_DIR)/$(IMG_PREFIX)$(if $(PROFILE_SANITIZED),-$(PROFILE_SANITIZED)).manifest \
@@ -365,7 +365,7 @@ opkg_target = \
 
 apk_target = \
 	$(call apk,$(mkfs_cur_target_dir)) --no-scripts \
-		--repositories-file /dev/zero --repository file://$(PACKAGE_DIR_ALL)/packages.adb
+		--repositories-file /dev/null --repository file://$(PACKAGE_DIR_ALL)/packages.adb
 
 
 target-dir-%: FORCE

package/Makefile

@@ -99,7 +99,7 @@ ifneq ($(CONFIG_USE_APK),)
 	$(file >$(TMP_DIR)/apk_install_list,\
 	    $(foreach pkg,$(shell cat $(PACKAGE_INSTALL_FILES) 2>/dev/null),$(pkg)$(call GetABISuffix,$(pkg))))
 	$(call apk,$(TARGET_DIR)) add --no-cache --initdb --no-scripts --arch $(ARCH_PACKAGES) \
-		--repositories-file /dev/zero --repository file://$(PACKAGE_DIR_ALL)/packages.adb \
+		--repositories-file /dev/null --repository file://$(PACKAGE_DIR_ALL)/packages.adb \
 		$$(cat $(TMP_DIR)/apk_install_list)
 else
 	$(file >$(TMP_DIR)/opkg_install_list,\