Revert "manifest: Tag librsvg: it breaks symbolic icons"
Revert "manifest: Tag librsvg: it breaks symbolic icons"

This reverts commit 1c8e41a4be325014a776e2cef7fe087ea881c48e.

Commit 7b4f82ccc6c180b809cd3b7b6582394ce741a14e in GTK+ fixes
symbolic icons to work with the new, stricter librsvg loader.

vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,GNOME/gnome-ostree,chergert/gnome-continuous,chergert/gnome-continuous,vrutkovs/vrutkovs.github.io,GNOME/gnome-ostree,GNOME/gnome-ostree