add a basic test for testing the update mode of recipetool
appendsrcfile(s)
(From OE-Core rev: f999092c772f10d23106c355e2787259befb6e30)
Signed-off-by: Julien Stephan <jstephan@baylibre.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>