Add missing CPPCheck unusedFunction check suppressions on the USB template functions.

BuildTests/BootloaderTest/BootloaderDeviceMap.cfg

...vers/USB/Core/AVR8/Template/Template_Endpoint_Control_R.c

...vers/USB/Core/AVR8/Template/Template_Endpoint_Control_W.c

LUFA/Drivers/USB/Core/AVR8/Template/Template_Endpoint_RW.c

LUFA/Drivers/USB/Core/AVR8/Template/Template_Pipe_RW.c

...ivers/USB/Core/UC3/Template/Template_Endpoint_Control_R.c

...ivers/USB/Core/UC3/Template/Template_Endpoint_Control_W.c

LUFA/Drivers/USB/Core/UC3/Template/Template_Endpoint_RW.c

LUFA/Drivers/USB/Core/UC3/Template/Template_Pipe_RW.c

...ers/USB/Core/XMEGA/Template/Template_Endpoint_Control_R.c

...ers/USB/Core/XMEGA/Template/Template_Endpoint_Control_W.c

LUFA/Drivers/USB/Core/XMEGA/Template/Template_Endpoint_RW.c