Make RtAudio return UTF-8 device names on Windows and Mac.

dep/Makefile

@@ -223,6 +223,8 @@ RTAUDIO_FLAGS += -DRTAUDIO_API_ASIO=OFF
 endif
 endif
 
+# RtAudio on Windows and Mac uses these macros to enable UTF-8 device names
+$(rtaudio): export CXXFLAGS += -DUNICODE -D_UNICODE
 $(rtaudio): | rtaudio
 	cd rtaudio && mkdir -p build
 	cd rtaudio/build && $(CMAKE) $(RTAUDIO_FLAGS) ..

dep/rtaudio

@@ -1 +1 @@
-Subproject commit b09307ac19de6c51c6410c35f655aad031133d75
+Subproject commit 22d64cdcb151e388791caceee8aa0011a6aa46e0