Move C labels to start-of-line

Also mark the corresponding lint test stable.

Change-Id: Ib7c9ed88c5254bf56e68c01cdbd5ab91cd7bfc2f
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/772
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/lib/xmodem.c

@@ -166,7 +166,7 @@ int xmodemReceive(unsigned char *dest, int destsz)
 			_outbyte(ACK);
 			continue;
 		}
-	reject:
+reject:
 		flushinput();
 		_outbyte(NAK);
 	}