fix: fix list-remote all has no output

Author: qianxinfeng

libexec/fvm.sh

@@ -142,6 +142,9 @@ function alias(){
 
 function list_remote(){
     local release_type="${1:-"/"}"
+    if [[ $release_type == 'all' ]];then
+      release_type='/'
+    fi
     local full_path="$2"
     local release_info_url="${FLUTTER_RELEASE_BASE_URL}/releases_linux.json"
     if [[ darwin ]];then