Import a8f058064d: Updated Debian 9 CI build to use newer Cmake (by Maki)

[daleglass]

This is an automated proposal to look at a commit made by Maki and import it into Overte

Commit:	a8f058064dcf9d116eae36ff6f482adda004f94d
Author:	Maki
Date:	Sat, 25 Apr 2020 11:24

Updated Debian 9 CI build to use newer Cmake

Stats:

Filename	Stats	Lines	Added	Removed	Lines in blame
.gitlab/build/linux.gitlab-ci.yml		5	4	1	⚠ 0
1 files	-	5	4	1	0

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• If the commit is useful, tag it with "Tivoli: Keep", and keep it open until it's merged.
• If the commit is not useful, tag it with "Tivoli: Discard", and close it.
• If the commit is not useful right now, but might be later, tag it with "Tivoli: Maybe later", and close it.
• If it's hard to decide, tag it with "Tivoli: Discuss", and keep it open.

Useful commits should be submitted as a PR against Overte. Tag this issue in PR, so that it's automatically closed once the PR is merged.

You can cherry-pick this issue with this command:

git cherry-pick a8f058064dcf9d116eae36ff6f482adda004f94d