Adjust log_fixup's expected buffer length to fix the test. It's pretty finicky in its length expectation, but it doesn't break often. So just adjust the length to work on current kernel and with follow up iterator changes as well. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20230302235015.2044271-6-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>