gnucash master: Fix travis - needs gwenhywfar gtk3 devel package

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash/commit/2b70b1c1 (commit)
	from  https://github.com/Gnucash/gnucash/commit/987fc15f (commit)



commit 2b70b1c1e46df4d46f627dfa37c6895473cc0a95
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Mon Feb 24 16:46:54 2020 +0100

    Fix travis - needs gwenhywfar gtk3 devel package



Summary of changes:
 util/ci/ubuntu-18.04-docker | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)