Package: postgresql-pltcl-9.4

"postgresql-pltcl-9.4" package binaries on Debian:

/usr/lib/postgresql/9.4/bin/pltcl_delmod /usr/lib/postgresql/9.4/bin/pltcl_listmod /usr/lib/postgresql/9.4/bin/pltcl_loadmod

You may install this package on Debian with apt-get install postgresql-pltcl-9.4