Use ALSA for speech synthesis

Changing the Makefile to use ALSA instead of PulseAudio.  Even if PulseAudio is running, tts still works since ALSA is routed through PA in that case.

Change-Id: I026f71caade65a4c99e60339698a6a456db3e721

BUG=chromium-os:10470
TEST=Manual, with pulseaudio disabled (USE="-pulseaudo", the default) tts should work

Review URL: http://codereview.chromium.org/6344012
1 file changed