The test case expects that printf(0x0) is (null) but for us this it is (NULL).
Use case-insensitive diff as the rest of the tests don't care about case.
(From OE-Core rev: b19a6501599ba7567c7c7d1456b62a8702a7e82a)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>