- replace no-ASCII copyright symbol with ASCII version (C)

src/devices/Keyboard.cc

src/devices/Keyboard.h

src/devices/PCI.cc

src/devices/PCI.h

src/devices/PIT.cc

src/devices/PIT.h

src/devices/RTC.cc

src/devices/RTC.h

src/devices/Screen.h

src/devices/Serial.cc

src/devices/Serial.h

src/extern/cdi/cdi_glue.cc

src/gdb/Gdb.cc

src/gdb/Gdb.h

src/generic/Benaphore.h

src/generic/Bitmap.h

src/generic/Buffers.h

src/generic/IntrusiveContainers.h

src/generic/ManagedArray.h

src/generic/RegionSet.h