Fixing static use of _dynamic_ modules as built-ins + dynamic loading / OS X

add/fix: linked-in static "dynamic" modules: pyobject + syzextra
fix: fixed static building of Singular
fix: adaptation for static embedding of syzextra

add: added '-flat_namespace -weak_reference_mismatches weak -undefined dynamic_lookup' due to Mac OS X
ps: -export-dynamic -avoid-version