In usr.sbin/sade/install.c and usr.sbin/sade/label.c, fix a few warnings about format strings not being literals.
In usr.sbin/sade/install.c and usr.sbin/sade/label.c, fix a few warnings
about format strings not being literals.

MFC after:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase