Draft: fix#443 WB1 addition for Ericsson/msvq code modularization cleanup

Long testvector triggers CNG WB1 bandwidth with 20 bands FDCNG for ISM2 at bitrate 16.4 kbps.

dct20 table (~120 Words TableROM) was added and the cleaned up code now allows for DCT24,DCT21 and DCT20