Announce: Flatpak 1.9.2

[Alexander Larsson]

Hot on the heels of 1.9.1 comes 1.9.2, now with less bugs!

Available here:
 https://github.com/flatpak/flatpak/releases/tag/1.9.2

$ sha256sum flatpak-1.9.2.tar.xz 
7c0425fb64c63cded58251c237130049ffee91ea050ae55296d1bae017767253  flatpak-1.9.2.tar.xz

Changes:
 * Some build fixes on non-x86-64 arches
 * Fix permission issue in endless installer
 * Fixed a bug where flatpak was accidentally clearing the summary  
   cache during updates in the user installation.
 * Fix handling of the multiarch permission.,
 * Add back the commit timestamp to the summary file.