Revert inadvertent change from 13157b1c; fix build-log.txt in backend/build.sh

8 jobs for master in 15 minutes and 28 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed #30380
backend

00:12:21

passed #30399
frontend

00:02:34

passed #30382
stats

00:00:33

passed #30243
backend

00:11:18

failed #30398
frontend

00:00:03

passed #30381
frontend

00:02:48

passed #30244
frontend

00:02:35

passed #30245
stats

00:00:32