When Hob receives a bb.command.CommandFailed event, it doesn't show any error,
because the error_msg is empty. If so, it is hard to detect the issue, because
Hob continues to run till it blocks because of an information gap.
[YOCTO #5097]
(Bitbake rev: a5abd1826f34e6a7eefa837620b846e9b62ae758)
Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>