scp-to-jenkins: Update release directory
scp-to-jenkins: Update release directory

A recent change in `kelda/tester` changed the release directory to be a
subdirectory of the releaser user's homedir.

LuiseV/quilt,LuiseV/quilt,kelda/kelda,quilt/quilt,quilt/quilt,kelda/kelda,NetSys/quilt,LuiseV/quilt,LuiseV/quilt,NetSys/quilt,quilt/quilt,LuiseV/quilt,NetSys/quilt,kelda/kelda,NetSys/quilt,kelda/kelda,NetSys/quilt,quilt/quilt