scripts/unit-test: Autodetect meson option types
scripts/unit-test: Autodetect meson option types

This will allow us to use booleans or feature type values for examples
and tests.

Change-Id: Ib2a51ef5491db8be5fdc26ad1afca687b4fc68cb
Signed-off-by: William A. Kennington III <30fff5198f4d10ca1117e5f3ec82f3b4b8900d81@google.com>

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