Merge branch 'for-master' into 'master'
authorBenjamin Otte <otte.benjamin@googlemail.com>
Sun, 9 Jun 2019 21:35:15 +0000 (21:35 +0000)
committerBenjamin Otte <otte.benjamin@googlemail.com>
Sun, 9 Jun 2019 21:35:15 +0000 (21:35 +0000)
testsuite: Make creating the output dir not racy

Closes #1942

See merge request GNOME/gtk!924


Trivial merge