Update file header copyrights for 2012.

Bootloaders/CDC/BootloaderAPI.c

Bootloaders/CDC/BootloaderAPI.h

Bootloaders/CDC/BootloaderCDC.c

Bootloaders/CDC/BootloaderCDC.h

Bootloaders/CDC/Descriptors.c

Bootloaders/CDC/Descriptors.h

Bootloaders/DFU/BootloaderAPI.c

Bootloaders/DFU/BootloaderAPI.h

Bootloaders/DFU/BootloaderDFU.c

Bootloaders/DFU/BootloaderDFU.h

Bootloaders/DFU/Descriptors.c

Bootloaders/DFU/Descriptors.h

Bootloaders/HID/BootloaderHID.c

Bootloaders/HID/BootloaderHID.h

Bootloaders/HID/Descriptors.c

Bootloaders/HID/Descriptors.h

Demos/Device/ClassDriver/AudioInput/AudioInput.c

Demos/Device/ClassDriver/AudioInput/AudioInput.h

Demos/Device/ClassDriver/AudioInput/Descriptors.c

Demos/Device/ClassDriver/AudioInput/Descriptors.h