Allow shared library suffix to be overridden
Allow shared library suffix to be overridden

micler/oiio,lgritz/oiio,mcanthony/oiio,bdeluca/oiio,YangYangTL/oiio,sambler/oiio,lgritz/oiio,mcanthony/oiio,OpenImageIO/oiio,cwilling/oiio,mcanthony/oiio,lgritz/oiio,OpenImageIO/oiio,scott-wilson/oiio,sambler/oiio,micler/oiio,micler/oiio,YangYangTL/oiio,sambler/oiio,bdeluca/oiio,micler/oiio,scott-wilson/oiio,OpenImageIO/oiio,sambler/oiio,bdeluca/oiio,YangYangTL/oiio,cwilling/oiio,OpenImageIO/oiio,bdeluca/oiio,YangYangTL/oiio,cwilling/oiio,scott-wilson/oiio,scott-wilson/oiio,mcanthony/oiio,lgritz/oiio,cwilling/oiio