Save output to build file

src/freedombone-ci

@@ -183,17 +183,17 @@ if [ ! -d "${downloads_directory}" ]; then
 fi
 cd "${build_directory}" || exit 1
 if [ ! "$build_info" ]; then
-    if ! /usr/local/bin/${PROJECT_NAME}-image -t "${target}" ${extra} --ci yes; then
+    if ! /usr/local/bin/${PROJECT_NAME}-image -t "${target}" ${extra} --ci yes 2> build.txt; then
         exit 10
     fi
 else
     if [[ "$build_info" == 'onion' ]]; then
-        if ! /usr/local/bin/${PROJECT_NAME}-image -t "${target}" ${extra} --onion yes --ci yes; then
+        if ! /usr/local/bin/${PROJECT_NAME}-image -t "${target}" ${extra} --onion yes --ci yes 2> build.txt; then
             exit 20
         fi
     fi
     if [[ "$build_info" == 'mesh'* ]]; then
-        if ! /usr/local/bin/${PROJECT_NAME}-image -t "${target}" -v "${build_info}" ${extra} --ci yes; then
+        if ! /usr/local/bin/${PROJECT_NAME}-image -t "${target}" -v "${build_info}" ${extra} --ci yes 2> build.txt; then
             exit 30
         fi
     fi