base-10: actually copy opts.gcc.c++17 into the image

15 jobs for master in 56 minutes and 5 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Stage0
passed #3447
pull base distributions

00:00:21

 
  Stage1
passed #3451
base:10

00:00:26

passed #3452
base:16.04

00:00:16

passed #3453
base:16.10

00:00:16

passed #3449
base:8

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passed #3450
base:9

00:00:18

passed #3448
docker-builder

00:00:18

 
  Stage2
passed #3454
base:8-backports

00:00:18

passed #3455
dune:2.3

00:00:19

passed #3456
dune:2.4

00:00:19

passed #3457
dune:2.5

00:00:43

passed #3458
dune:git

00:26:05

 
  Stage3
passed #3459
dune-fufem:2.4

00:00:15

passed #3460
dune-fufem:git

00:06:34

 
  Publish
passed #3461
publish

00:22:05