dump.cc: Slow down outputs
dump.cc: Slow down outputs

Inserts pauses into dump() output to ensure that UART is not flooded.

The best way to solve this would be to investigate the actual cause of
the data loss - likely the UARTs buffers or the FTDI chip's buffers are
overflowing.

google/CFU-Playground,google/CFU-Playground,google/CFU-Playground,google/CFU-Playground