[gnome-software] trivial: Build the flatpak repos with a set timestamp

[Richard Hughes <rhughes src gnome org>]

commit ef1636d262c8b80a1f63c419edbbf9166dc9be03
Author: Richard Hughes <richard hughsie com>
Date:   Fri Mar 3 21:55:59 2017 +0000

    trivial: Build the flatpak repos with a set timestamp
    
    This requires flatpak from git master.

 data/tests/flatpak/build.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/tests/flatpak/build.py b/data/tests/flatpak/build.py
index 09a3a87..67fa6d2 100755
--- a/data/tests/flatpak/build.py
+++ b/data/tests/flatpak/build.py
@@ -52,6 +52,7 @@ def build_flatpak(appid, srcdir, repodir, cleanrepodir=True):
     argv.append(repodir)
     argv.append(os.path.join(srcdir, appid))
     argv.append('--update-appstream')
+    argv.append('--timestamp=2016-09-15T01:02:03')
     if is_runtime:
         argv.append('--runtime')
     subprocess.call(argv)