Add in absolute URI test fixtures

Forgot these in an earlier commit. Add in a couple examples of absolute URIs in a media playlist.

+{
+  "allowCache": true,
+  "targetDuration": 10,
+  "mediaSequence": 0,
+  "playlistType": "VOD",
+  "segments": [{
+    "duration": 10,
+    "uri": "http://example.com/00001.ts"
+  }, {
+    "duration": 10,
+    "uri": "https://example.com/00002.ts"
+  }, {
+    "duration": 10,
+    "uri": "//example.com/00003.ts"
+  }, {
+    "duration": 10,
+    "uri": "http://example.com/00004.ts"
+  }]
+}

+#EXTM3U
+#EXT-X-PLAYLIST-TYPE:VOD
+#EXT-X-TARGETDURATION:10
+#EXTINF:10,
+http://example.com/00001.ts
+#EXTINF:10,
+https://example.com/00002.ts
+#EXTINF:10,
+//example.com/00003.ts
+#EXTINF:10,
+http://example.com/00004.ts
+#ZEN-TOTAL-DURATION:57.9911
+#EXT-X-ENDLIST