meld fallback assumes that user has a gnome desktop
its better to fallback to good old diff tool which
will most distributions on build host will carry
(From OE-Core rev: d027236eac2a136b06903d4a47adbc50ccd6b7c6)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>