Improve native HLS buffering fudge factor

Based on experimental evidence, this fudge factor has been increased
from 50ms to 100ms.  This is based on playback of the Art of Motion
HLS clip from Bitcodin, where the 50ms fudge was insufficient.

Without this, it goes into a buffering state at the end of the
content.

Issue #997

Change-Id: I7479705fd9e9359e70ab6ed3f24fd29dfdd7631e

lib/player.js

@@ -4970,7 +4970,7 @@ shaka.Player.prototype.isBufferedToEndSrc_ = function() {
   // buffering state at the end of the stream.
   // TODO: Try to remove the fudge here once we no longer manage buffering state
   // above the browser with playbackRate=0.
-  const fudge = 0.05;  // 50 ms
+  const fudge = 0.1;  // 100 ms
   return bufferEnd >= this.video_.duration - fudge;
 };