initram: ignore non-repositories in packages/ subdir

initramfs-init

@@ -226,8 +226,8 @@ fi
 # install new root
 ebegin "Installing packages to root filesystem"
 mkdir -p /etc/apk
-for i in $ALPINE_MNT/packages/*; do
-	echo $i >> /etc/apk/repositories
+for i in $ALPINE_MNT/packages/* $ALPINE_MNT/apks; do
+	[ -r "$i/APK_INDEX.gz" ] && echo $i >> /etc/apk/repositories
 done
 if [ -n "$KOPT_chart" ]; then
 	pkgs="$pkgs acct"