lib: oeqa: spdx: Add tests for extra options

lib: oeqa: spdx: Add tests for extra options

Adds a test for several of the extra options provided by the SPDX
classes. In particular, these are the options that can produce
non-reproducible results, so are not enabled by default in OE core. This
test takes care to configure the build so that the tests do run in a
reproducible manner so that pre-built test objects can be pulled from
sstate

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>