manifest: Remove --enable-debug from Mesa
manifest: Remove --enable-debug from Mesa

It just generates pointless spam at the moment.

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