Revert "remove VintageDreamsWaves-v2.sf3"

This reverts commit a36c06cff2. We've got
explicit permission from Ian Wilson to convert it to SF3.

Addresses #701.

sf2/COPYRIGHT.txt

@@ -18,3 +18,54 @@
  http://www.geocities.com/SiliconValley/Campus/8645/index.html
  http://members.nbci.com/silicon39/
  http://www.mp3.com/silicon39
+ http://analoguesque.x10host.com/
+
+
+ Update 2020-10-31:
+ 
+ Ian Wilson has granted FluidSynth explicit permission to convert
+ Vintage Dreams Waves to SF3:
+ 
+    On Sat, Oct 31, 2020 Tom M. wrote:
+
+        Hello Ian,
+
+        I'm the current maintainer of the open-source SoundFont synthesizer
+        FluidSynth. We are currently using your VintageDreamsWaves-v2.sf2 for
+        unit testing, as we found it small and useful.
+
+        We would like to convert this SoundFont to SoundFont3 (an unofficial
+        extension to SF2 which stores the individual samples as OGG/Vorbis
+        compressed stream, rather than PCM).
+
+        However, your copyright notice doesn't allow your SoundFont to be
+        converted to other formats:
+
+        https://github.com/FluidSynth/fluidsynth/blob/master/sf2/COPYRIGHT.txt
+
+        May I ask for your explicit permission to convert your font to SF3 and
+        place it into our public Git repository? Apart from the lossy Vorbis
+        compression, your SoundFont would not be modified further.
+
+        No matter how you decide, thanks for your work!
+
+        Regards
+        Tom
+
+        http://www.fluidsynth.org/
+
+ 
+    On Sat, Oct 31, 2020 Ian Wilson replied:
+
+        Hi Tom,
+
+        Great to hear from you, and thanks for reaching out regarding the SoundFont license.
+
+        Your unofficial SoundFont 3 project sounds very interesting, and glad you could get use out of the Vintage Dreams Waves.
+
+        You are welcome to convert it to the SoundFont 3 format.
+
+        Please let me know how it all works out.
+
+        Regards
+        Ian

test/CMakeLists.txt

@@ -26,6 +26,6 @@ ADD_FLUID_TEST(test_seq_evt_order)
 ADD_FLUID_TEST(test_seq_event_queue_remove)
 ADD_FLUID_TEST(test_jack_obtaining_synth)
 
-# if ( LIBSNDFILE_HASVORBIS )
-#     ADD_FLUID_TEST(test_sf3_sfont_loading)
-# endif ( LIBSNDFILE_HASVORBIS )
+if ( LIBSNDFILE_HASVORBIS )
+    ADD_FLUID_TEST(test_sf3_sfont_loading)
+endif ( LIBSNDFILE_HASVORBIS )