Merge lp:~jonas-drange/unity8-session-snap/set-xdg-greeter-dir into lp:unity8-session-snap

[Jonas G. Drange]

creates and sets XDG_GREETER_DATA_DIR to some writable directory

[lp:~jonas-drange/unity8-session-snap/set-xdg-greeter-dir]

85. By Jonas G. Drange on 2016-11-28

removes unnecessary if

=== modified file 'overlay/snappyenv'
--- overlay/snappyenv	2016-11-22 21:25:40 +0000
+++ overlay/snappyenv	2016-11-28 15:04:32 +0000
@@ -72,6 +72,10 @@
 export LD_LIBRARY_PATH=$SNAP/usr/lib/pulse-8.0/modules:$LD_LIBRARY_PATH
 export LD_LIBRARY_PATH=$SNAP/usr/lib/telepathy/gabble-0/lib:$LD_LIBRARY_PATH
 
+# We can't write to XDG_GREETER_DATA_DIR, so create it. lp:1644586
+export XDG_GREETER_DATA_DIR=$SNAP_COMMON/lightdm-data/ubuntu
+mkdir -p $SNAP_COMMON/lightdm-data/ubuntu
+
 # XDG Config
 export XDG_CONFIG_DIRS=$SNAP/xdg-config-dirs:$XDG_CONFIG_DIRS
 export XDG_DATA_DIRS=$SNAP/:$XDG_DATA_DIRS