You can not change it unless you load them separately (dependent objects first).
It is likely not worth the hassle - your invalid procedure will be automatocally recompiled on next call. And if it compiles in moment you call it - all is ok.
If you prefer you can try to compile all invalid objects at the end of import (user_objects.status = 'INVALID' ). There is also sql script in oracle server rdbms/admin directory...