Add g1_mul_dig() and g2_mul_dig() macros.
Add g1_mul_dig() and g2_mul_dig() macros.

sruesch/relic,OlegHahm/relic,ukscone/relic,tfar/relic,tfar/relic,sruesch/relic,ukscone/relic,tfar/relic,ace0/relic,ace0/relic,ace0/relic,ace0/relic,sruesch/relic,OlegHahm/relic,OlegHahm/relic,ukscone/relic