add fluidsynth test

test/fluidsynth.cpp

@@ -0,0 +1,17 @@
+#include <fluidsynth.h>
+
+#include <stdio.h>
+
+int main()
+{
+    AEDI_EXPECT(fluid_version_str() != nullptr);
+
+    fluid_settings_t* settings = new_fluid_settings();
+    AEDI_EXPECT(settings != nullptr);
+
+    fluid_synth_t* synth = new_fluid_synth(settings);
+    AEDI_EXPECT(synth != nullptr);
+
+    delete_fluid_synth(synth);
+    delete_fluid_settings(settings);
+}