This works just like the already existing --no-clean option to the
`devtool reset` command.
(From OE-Core rev: 4433d3133ce53cdf7db17f5e7914fe8c4d78dba3)
Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>