Fix manifest backup path
Fix manifest backup path

Use wildcard before the dot extension separator to cover new Rails 4 manifest name using a dash and a digest number.
jongamboa17/rails,YourCursus/capistrano-docker-cloud,custom-exposure/rails,0x00evil/rails-1,mzaccari/rails,ipmobiletech/rails-1,YourCursus/capistrano-docker-cloud,inner-whisper/rails,banux/rails,ershad/capistrano-rails,k-yamada/capistrano-rails,annaswims/rails-1,januszm/capistrano-rails,kewaunited/rails-1,capistrano/rails