ocarina: Add stop as a pipe action

Signed-off-by: Bryan Schumaker <bjschuma@gmail.com>

ocarina/pipe.cpp

@@ -17,6 +17,8 @@ void perform_action(string action)
 		libsaria::audio::play();
 	else if (action == "pause")
 		libsaria::audio::pause();
+	else if (action == "stop")
+		libsaria::audio::stop();
 	else if (action == "next")
 		libsaria::next();
 }

scripts/ocarina-stop

@@ -0,0 +1,2 @@
+#!/bin/bash
+%%OCARINA%%-write-pipe "stop"