[glib/wip/hadess/avoid-unintended-success] ci: Fix xdg-desktop-portal build

[Bastien Nocera <hadess src gnome org>]

commit f5f3a35cd354601b2aaeb47b90062f6844fa1afe
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Feb 21 18:55:56 2020 +0100

    ci: Fix xdg-desktop-portal build
    
    Newer versions of xdg-desktop-portal need a newer PipeWire, so use the
    latest release that doesn't contain this change to avoid having
    something else to build.

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 91e5b3b72..b3b0b45f1 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -142,6 +142,7 @@ installed-tests:
     # GMemoryMonitor support, see:
     # https://github.com/flatpak/xdg-desktop-portal/pull/365
     - git clone --single-branch https://github.com/flatpak/xdg-desktop-portal.git
+    - git reset --hard 1.6.0
     - cd xdg-desktop-portal
     - ./autogen.sh --prefix=/usr --libdir=/usr/lib64 --disable-libportal --disable-dependency-tracking
     - make