lib: readline support ctrl-l to clear screen
maybe it is easier to press ctrl-l to clear the screen than type
'clear' command.

Signed-off-by: Du Huanpeng <u74147@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent 1322647 commit 405c6e09dd4b7179573a64563be95ca47686c1ef
@Du Huanpeng Du Huanpeng authored on 14 Nov 2015
Sascha Hauer committed on 17 Nov 2015
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lib/readline.c