Needed by dtdiff which calls `diff` to display its result.
(From OE-Core rev: ace8b318038389c07694ae5234811ce92982ddc8)
Signed-off-by: Ioan-Adrian Ratiu <adi@adirat.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>