sensorsmonitor.py: Flush stdout after every batch.
sensorsmonitor.py: Flush stdout after every batch.

This is convenient when piping through other tools like `grep` or `tee`.
By default when stdout is not directed to a terminal it becomes
block-buffered, so output is delayed until the output buffer is
completely full.

GaloisInc/ivory-tower-stm32,GaloisInc/ivory-tower-stm32,GaloisInc/ivory-tower-stm32