[gnome-photos] Non-fast-forward update to branch wip/phako/fix-gexiv2-build

[Debarshi Ray <debarshir src gnome org>]

The branch 'wip/phako/fix-gexiv2-build' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  7b96d54... flatpak: Use proper option for gexiv2 master

Commits added to the branch:

  218082c... flatpak: Update the build flags for gexiv2