Play sound on orange DM alert infinitely (commaai#392)

* simulate driving

* debugging

* debugging

* always engaged

* fix

* fix

* see if this works

* see if this works

* try this

* try this

* revert

* how about this

* shh

* show orange for longer to debug

* repeat infinitely

* stock behavior

* stock behavior

* now verifiably better

* revert

* revert

selfdrive/ui/sound.hpp

@@ -10,7 +10,7 @@ static std::map<AudibleAlert, std::pair<const char *, int>> sound_map {
   {AudibleAlert::CHIME_ENGAGE, {"../assets/sounds/engaged.wav", 0}},
   {AudibleAlert::CHIME_WARNING1, {"../assets/sounds/warning_1.wav", 0}},
   {AudibleAlert::CHIME_WARNING2, {"../assets/sounds/warning_2.wav", 0}},
-  {AudibleAlert::CHIME_WARNING2_REPEAT, {"../assets/sounds/warning_2.wav", 3}},
+  {AudibleAlert::CHIME_WARNING2_REPEAT, {"../assets/sounds/warning_2.wav", -1}},
   {AudibleAlert::CHIME_WARNING_REPEAT, {"../assets/sounds/warning_repeat.wav", -1}},
   {AudibleAlert::CHIME_ERROR, {"../assets/sounds/error.wav", 0}},
   {AudibleAlert::CHIME_PROMPT, {"../assets/sounds/error.wav", 0}}