xscreensaver: update to 5.40.

5.40 * New hacks, 'filmleader', 'vfeedback'.
* New hack, 'glitchpeg' (X11 and macOS only).
* GLPlanet blends between day and night maps at the dusk terminator.
* DymaxionMap can display arbitrary map images, and animate sunlight
          across the flattened globe.
* Tessellimage can draw either Delaunay or Voronoi tilings.
* XAnalogTV includes test cards.
* Android: These hacks work now: 'blitspin', 'bumps', 'cityflow',
  'endgame', 'esper', 'flipscreen3d', 'gleidescope', 'glslideshow',
  'jigglypuff', 'queens', 'tessellimage', 'xanalogtv', 'xmatrix',
  'zoom'.

(wiz)