tree d7926df4f10a228496aeff5f2b5035ab7cd7d3c9
parent 5f59bb48aceae97930d6a6dd6b26174f200121ed
author June Tate-Gans <jtgans@google.com> 1545255591 -0800
committer Peter Nordström <pnordstrom@google.com> 1579041616 -0800

fastboot: Make it print something useful while in this mode

Many, many times we've assumed that our boards have become unresponsive while
connected to serial, when, in fact, the board is actually just in fastboot mode.
This adds a little message that gets printed out to the serial console when the
user presses any key.

Change-Id: Iae1ed62ac73caea6b7b75d3ae9a3a6d2ea9686c6