Import fbb85765f8: Added qt for Debian 9 (by Maki)

[daleglass]

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

Commit:	fbb85765f8d3fec2d89849bf4a03a8c0a3fabc25
Author:	Maki
Date:	Fri, 24 Apr 2020 14:27

Added qt for Debian 9

Stats:

Filename	Stats	Lines	Added	Removed	Lines in blame
hifi_qt.py		9	5	4	⚠ 0
tools/qt-builder/.gitignore		4	3	1	2
tools/qt-builder/BUILD_LINUX.md		19	15	4	8
tools/qt-builder/BUILD_MACOS.md		3	0	3	⚠ 0
tools/qt-builder/BUILD_WINDOWS.md		3	0	3	⚠ 0
tools/qt-builder/docker-debian-9.sh		8	8	0	⚠ File gone
6 files	-	46	31	15	10

To work on this, please assign the issue to yourself, then look at the commit and decide whether this would be a good addition to Overte.

• 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 fbb85765f8d3fec2d89849bf4a03a8c0a3fabc25