Make CHANNELSDIR in smart empty, since this causes host contamination issues
on some RPM-based hosts on which smart is already installed.
[YOCTO #3881]
(From OE-Core rev: 94e76a98b6cdafe9547630be159401ac1d8c5edd)
Signed-off-by: Bogdan Marinescu <bogdan.a.marinescu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
