xfce-build: Add libclutter-1.0-dev for xfdashboard build

Dockerfile

@@ -10,7 +10,7 @@ RUN sed -Ei 's/^# deb-src /deb-src /' /etc/apt/sources.list
 RUN apt-get update \
   && apt-get -y --no-install-recommends install git libglib2.0-bin build-essential libgtk-3-dev gtk-doc-tools libx11-dev libglib2.0-dev libwnck-3-dev intltool liburi-perl x11-xserver-utils libvte-2.91-dev dbus-x11 cmake libsoup2.4-dev libpcre2-dev libgtksourceview-3.0-dev libgtksourceview-4-dev libtag1-dev \
   && apt-get -y --no-install-recommends install gir1.2-gstreamer-1.0 libgstreamer-gl1.0-0 libgstreamer-plugins-base1.0-0 libgstreamer-plugins-base1.0-dev libgstreamer1.0-0 libgstreamer1.0-dev \
-  python3-distutils-extra  libxss-dev libindicator3-dev libxmu-dev libburn-dev libisofs-dev  libpulse-dev libkeybinder-3.0-dev libmpd-dev valac libvala-0.48-dev gobject-introspection libgirepository1.0-dev librsvg2-dev libtagc0-dev libdbusmenu-gtk3-dev libgtop2-dev libtool libnotify-dev libxklavier-dev libexif-dev libgudev-1.0-dev libupower-glib-dev \
+  python3-distutils-extra  libxss-dev libindicator3-dev libxmu-dev libburn-dev libisofs-dev  libpulse-dev libkeybinder-3.0-dev libmpd-dev valac libvala-0.48-dev gobject-introspection libgirepository1.0-dev librsvg2-dev libtagc0-dev libdbusmenu-gtk3-dev libgtop2-dev libtool libnotify-dev libxklavier-dev libexif-dev libgudev-1.0-dev libupower-glib-dev libclutter-1.0-dev \
   && rm -rf /var/lib/apt/lists/*
 
 # Build and install the latest tag for all Xfce core libraries