FetchError isn't defined, use bb.fetch2.FetchError in this context.
(Bitbake rev: 945fa980e027753df2c21d84eb63dcaddb2caaee)
Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>