update gen_dr_h.sh to use the new header file tree
update gen_dr_h.sh to use the new header file tree

paraeco/libdvbpsi,mwgoldsmith/dvbpsi,mwgoldsmith/dvbpsi,mwgoldsmith/dvbpsi,paraeco/libdvbpsi,mwgoldsmith/dvbpsi,paraeco/libdvbpsi,paraeco/libdvbpsi