Compile++

I've no idea why i need this for it to compile now, but kind of makes sense to follow the
same pattern for all the phonon includes, so unify with the rest of includes in this file

core/audioplayer.cpp

@@ -15,7 +15,7 @@
 #include <qdir.h>
 #include <kdebug.h>
 #include <krandom.h>
-#include <Phonon/Path>
+#include <phonon/path.h>
 #include <phonon/audiooutput.h>
 #include <phonon/abstractmediastream.h>
 #include <phonon/mediaobject.h>