[posix] correct config.guess path (#2687)
[posix] correct config.guess path (#2687)


mszczodrak/openthread,georgecpr/openthread,chshu/openthread,georgecpr/openthread,openthread/openthread,lanyuwen/openthread,chshu/openthread,abtink/openthread,LeZhang2016/openthread,georgecpr/openthread,bukepo/openthread,turon/openthread,abtink/openthread,turon/openthread,chshu/openthread,abtink/openthread,librasungirl/openthread,librasungirl/openthread,chshu/openthread,srickardti/openthread,gandreello/openthread,gandreello/openthread,jwhui/openthread,erja-gp/openthread,pvanhorn/openthread,erja-gp/openthread,pvanhorn/openthread,srickardti/openthread,openthread/openthread,gandreello/openthread,LeZhang2016/openthread,abtink/openthread,gandreello/openthread,jwhui/openthread,mszczodrak/openthread,jwhui/openthread,mszczodrak/openthread,erja-gp/openthread,LeZhang2016/openthread,erja-gp/openthread,georgecpr/openthread,georgecpr/openthread,chshu/openthread,openthread/openthread,lanyuwen/openthread,bukepo/openthread,librasungirl/openthread,gandreello/openthread,erja-gp/openthread,pvanhorn/openthread,chshu/openthread,librasungirl/openthread,turon/openthread,erja-gp/openthread,bukepo/openthread,LeZhang2016/openthread,LeZhang2016/openthread,srickardti/openthread,mszczodrak/openthread,turon/openthread,pvanhorn/openthread,lanyuwen/openthread,lanyuwen/openthread,LeZhang2016/openthread,pvanhorn/openthread,pvanhorn/openthread,lanyuwen/openthread,jwhui/openthread,openthread/openthread,mszczodrak/openthread,mszczodrak/openthread,gandreello/openthread,srickardti/openthread,georgecpr/openthread,bukepo/openthread,lanyuwen/openthread