Delete ./vendor before each sync

This workarounds missing namespace errors (see #
674)

src/new_build.sh

@@ -32,6 +32,7 @@
 #    For each device in `$DEVICE_LIST`
 #     - setup subdirectories
 #     - `repo init`
+#     - Delete ./vendor
 #     - `repo sync`
 #     - setup our overlays
 #     - Add custom packages to be installed
@@ -169,6 +170,7 @@ if [ "$INCLUDE_PROPRIETARY" = true ]; then
     "https://gitlab.com/the-muppets/manifest/raw/$themuppets_branch/muppets.xml" .repo/local_manifests/proprietary_gitlab.xml
 fi
 
+
 # Sync mirror if we're using one
 if [ "$LOCAL_MIRROR" = true ]; then
 
@@ -226,6 +228,10 @@ for codename in ${devices//,/ }; do
   # `repo sync`
   if [ "$CALL_REPO_SYNC" = true ]; then
     echo ">> [$(date)] Syncing branch repository" | tee -a "$repo_log"
+
+    # Delete ./vendor
+    rm -rf vendor || true
+
     repo sync "${jobs_arg[@]}" "${retry_fetches_arg[@]}" --current-branch --force-sync &>> "$repo_log"
   else
     echo ">> [$(date)] Syncing branch repository disabled" | tee -a "$repo_log"