Some uboots don't have echo, support them too

Signed-off-by: Mike Anderson <[email protected]>

devices/openwrt_router.py

@@ -92,9 +92,11 @@ def reset(self, break_into_uboot=False):
                 self.expect('Hit any key ')
                 self.sendline('\n\n\n\n\n\n\n') # try really hard
                 self.expect(self.uprompt, timeout=4)
+                # Confirm we are in uboot by typing any command.
+                # If we weren't in uboot, we wouldn't see the command
+                # that we type.
                 self.sendline('echo FOO')
                 self.expect('echo FOO', timeout=4)
-                self.expect('FOO')
                 self.expect(self.uprompt, timeout=4)
                 return
             except Exception as e: