From: Íñigo Huguet on
gitlab.com
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/2339#note_1300...
Well, now it complains this:
```
# -MAKEFLAGS=w -- HEAD=fce15c45d3fb DISTRO=rhel DIST=.fc25 RHSELFTESTDATA=1
# +MAKEFLAGS= -- HEAD=fce15c45d3fb DISTRO=rhel DIST=.fc25 RHSELFTESTDATA=1
```
That `w` flag seems to be added automatically when make is called as sub-make.
'dist-self-test-data' calls 'create-data.sh', which in turns calls `make
dist-
dump-variables`, so it's called as sub-make.
I don't know what to do to avoid that flag being added, and I don't know why
it's not added when others update self-test/data...