ptest-packagelists.inc: add python test license-expression

ptest-packagelists.inc: add python test license-expression

Adding test to the list of tests with problems. It comes as a
copy from meta-python to satisfy dependencies of python3-spdx-tools
and throws and exception on execution.

Signed-off-by: Marta Rybczynska <mrybczynska@syslinbit.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>