Set rss permissions after upgrades

src/freedombone-app-rss

 }
 
 function upgrade_rss {
+    RSS_MOBILE_READER_PATH=/etc/share/ttrss-mobile
+
     if [[ $(app_is_installed rss) == "1" ]]; then
         function_check set_repo_commit
         set_repo_commit $RSS_READER_PATH "rss reader commit" "$RSS_READER_COMMIT" $RSS_READER_REPO
             exit 63452
         fi
 
-        RSS_MOBILE_READER_PATH=/etc/share/ttrss-mobile
-
         # remove any previous install
         if [ -d $RSS_READER_PATH/g2ttree-mobile ]; then
             if [[ $(is_completed "install_rss_mobile_reader") == "1" ]]; then
         function_check set_repo_commit
         set_repo_commit $RSS_MOBILE_READER_PATH "rss mobile reader commit" "$RSS_MOBILE_READER_COMMIT" $RSS_MOBILE_READER_REPO
     fi
+
+    chown -R www-data:www-data $RSS_MOBILE_READER_PATH
+    chown -R www-data:www-data $RSS_READER_PATH
+    chmod a+x $RSS_MOBILE_READER_PATH
 }
 
 function backup_local_rss {