Use the new USB_STRING_DESCRIPTOR macro for every string descriptor.

Bootloaders/CDC/Descriptors.c

Bootloaders/DFU/Descriptors.c

Bootloaders/Printer/Descriptors.c

Demos/Device/ClassDriver/AudioInput/Descriptors.c

Demos/Device/ClassDriver/AudioOutput/Descriptors.c

Demos/Device/ClassDriver/DualVirtualSerial/Descriptors.c

Demos/Device/ClassDriver/GenericHID/Descriptors.c

Demos/Device/ClassDriver/Joystick/Descriptors.c

Demos/Device/ClassDriver/KeyboardMouse/Descriptors.c

...Device/ClassDriver/KeyboardMouseMultiReport/Descriptors.c

Demos/Device/ClassDriver/MIDI/Descriptors.c

Demos/Device/ClassDriver/MassStorage/Descriptors.c

Demos/Device/ClassDriver/MassStorageKeyboard/Descriptors.c

Demos/Device/ClassDriver/Mouse/Descriptors.c

Demos/Device/ClassDriver/RNDISEthernet/Descriptors.c

Demos/Device/ClassDriver/VirtualSerial/Descriptors.c

...Device/ClassDriver/VirtualSerialMassStorage/Descriptors.c

Demos/Device/ClassDriver/VirtualSerialMouse/Descriptors.c

Demos/Device/Incomplete/TestAndMeasurement/Descriptors.c

Demos/Device/LowLevel/AudioInput/Descriptors.c