package/pkg-meson: add support for new cpu families

Add mappings for new cpu families based on the reference table:
https://mesonbuild.com/Reference-tables.html#cpu-families



Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>