build_wrapper: Remove submodules_{tar,zip} from SRC_DEST_DIRS

Don't create these directories in the remote servers, they are
never used.

This is a left over from b77c9c50e1f67f922a8a188a82e8ca60b2859ee1

Change-Id: Ib0f90201415f9787181a2309adf1c3d4c893ef63
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>