In sbin/camcontrol/camcontrol.c, fix a few warnings about format strings not being literals.
In sbin/camcontrol/camcontrol.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