Reorder package list sources

- local packages should be prioritiezed if we have custom builds, like
  collectd
- the docs at
  https://openwrt.org/docs/guide-user/additional-software/imagebuilder#adding_package_repositories
  explain that the repos are searched in the order they are in the file

.buildbot/openwrt/build.sh

@@ -56,6 +56,8 @@ make info
 echo "CONFIG_TARGET_ROOTFS_PARTSIZE=308" >> .config
 # Disable ext4 images
 echo "CONFIG_TARGET_ROOTFS_EXT4FS=n" >> .config
+# re-enable collectd encrypted network, it gets removed somewhere
+echo "CONFIG_PACKAGE_COLLECTD_ENCRYPTED_NETWORK=y" >> .config
 
 PACKAGES="kmod-i2c-bcm2835 kmod-i2c-mux kmod-i2c-mux-pinctrl \
           kmod-nf-nathelper-extra \
@@ -122,6 +124,14 @@ pushd ${BOOTSOURCE}
 git apply ${pwd}/patches/bootconfig-add.patch
 popd
 
+# reorder packages so the local ones have a higher priority
+sed -i -E 's/^(src imagebuilder file:packages.*)/#\1/
+5i src imagebuilder file:packages' \
+   repositories.conf
+
+# debug
+cat repositories.conf
+
 make image PROFILE=${PROFILE} \
      PACKAGES="${PACKAGES}" DISABLED_SERVICES="dropbear" FILES="files" || exit 1