Updating the kernel SRCREVs to pickup the stable 3.0.18 release.
(From OE-Core rev: b1a4d1a912af39dc3be7433a1e2ed4c48d5ffb93)
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>