make: Fix misspell invocation
make: Fix misspell invocation

Some versions of `find` require the `-type` argument be only one letter.

NetSys/quilt,LuiseV/quilt,NetSys/quilt,ejj/quilt-dev,mmussomele/quilt,mmussomele/quilt,tejasmanohar/quilt,kklin/kelda,kklin/quilt,ejj/quilt-dev,tejasmanohar/quilt,stevenlin598/quilt,kklin/kelda,quilt/quilt,stevenlin598/quilt,ejj/quilt-dev,mmussomele/quilt,LuiseV/quilt,LuiseV/quilt,kayousterhout/quilt,quilt/quilt,ejj/quilt-dev,kklin/kelda,kayousterhout/quilt,kelda/kelda,mmussomele/quilt,PenguinToast/quilt,PenguinToast/quilt,stevenlin598/quilt,kklin/kelda,stevenlin598/quilt,tejasmanohar/quilt,LuiseV/quilt,PenguinToast/quilt,PenguinToast/quilt,tejasmanohar/quilt,PenguinToast/quilt,stevenlin598/quilt,NetSys/quilt,stevenlin598/quilt,mmussomele/quilt,kklin/quilt,kayousterhout/quilt,quilt/quilt,kklin/quilt,kelda/kelda,mmussomele/quilt,NetSys/quilt,LuiseV/quilt,quilt/quilt,kklin/quilt,NetSys/quilt,kelda/kelda,kayousterhout/quilt,kelda/kelda