Don't add inappropiate channels on the target.
This happens when building two different machines in the
same dir and then running the tests for each machine.
(From OE-Core rev: 9e4e475b598f6b9bd2b653c72a1c1d5bd5c0b8c9)
Signed-off-by: Stefan Stanacar <stefanx.stanacar@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>