Fixes to make the lubuntu livefs behave when swapping to the HWE stack.

* lubuntu: Select lubuntu-gtk-core task as well, so we get the HWE filter
  applied to the explicit dependencies it has on Xorg-recommended packages.
* lubuntu: Manually install some packages that fall out due to the above.

debian/changelog

@@ -1,3 +1,11 @@
+livecd-rootfs (2.525.16) bionic; urgency=medium
+
+  * lubuntu: Select lubuntu-gtk-core task as well, so we get the HWE filter
+    applied to the explicit dependencies it has on Xorg-recommended packages.
+  * lubuntu: Manually install some packages that fall out due to the above.
+
+ -- Adam Conrad <adconrad@ubuntu.com>  Mon, 04 Feb 2019 12:48:51 -0700
+
 livecd-rootfs (2.525.15) bionic; urgency=medium
 
   * Forward-port HWE support from xenial, make it more generic, and enable

live-build/auto/config

@@ -466,7 +466,12 @@ case $PROJECT in
 	lubuntu)
 		HWE="yes"
 		KERNEL_FLAVOURS="generic${HWE:+-$HWE_SUFFIX}"
-		add_task install minimal standard lubuntu-desktop
+		add_task install minimal standard lubuntu-gtk-core lubuntu-desktop
+		# Installing the lubuntu-gtk-core task explicitly appears
+		# to make dbus-user-session not get installed anymore:
+		add_package install dbus-user-session
+		# These themes also get dropped, maybe worth looking closer:
+		add_package install humanity-icon-theme gnome-icon-theme adwaita-icon-theme
 		LIVE_TASK='lubuntu-live'
 		case $ARCH in
 			amd64)	add_package live linux-signed-$KERNEL_FLAVOURS ;;