build-unit-test-docker: Update CLI11 1.7.1 -> 1.8.0
build-unit-test-docker: Update CLI11 1.7.1 -> 1.8.0

meta-oe is using CLI11 1.8.0 now and it introduces some useful APIs like
require_option().

Signed-off-by: Lei YU <a3094571254a8e1f82a212e5bbbfd045adf48936@gmail.com>
Change-Id: Id272c4e440c0a31097d3951794dc63b921dc983b

openbmc/openbmc-build-scripts,openbmc/openbmc-build-scripts