[ecdsa] do not free mpi context before initializing it (#3366)
[ecdsa] do not free mpi context before initializing it (#3366)


openthread/openthread,openthread/openthread,srickardti/openthread,bukepo/openthread,abtink/openthread,turon/openthread,librasungirl/openthread,lanyuwen/openthread,librasungirl/openthread,jwhui/openthread,lanyuwen/openthread,lanyuwen/openthread,turon/openthread,erja-gp/openthread,jwhui/openthread,chshu/openthread,erja-gp/openthread,jwhui/openthread,chshu/openthread,librasungirl/openthread,bukepo/openthread,abtink/openthread,erja-gp/openthread,lanyuwen/openthread,srickardti/openthread,librasungirl/openthread,chshu/openthread,lanyuwen/openthread,srickardti/openthread,openthread/openthread,erja-gp/openthread,chshu/openthread,chshu/openthread,jwhui/openthread,abtink/openthread,erja-gp/openthread,srickardti/openthread,bukepo/openthread,turon/openthread,turon/openthread,erja-gp/openthread,lanyuwen/openthread,chshu/openthread,bukepo/openthread,openthread/openthread,abtink/openthread