configure: make pulseaudio a configurable option

Allows disabling pulseaudio support at configure time.

Upstream-Status: Pending

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
configure: make alsa a configurable option

Allows disabling alsa support at configure time.

Upstream-Status: Pending

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
configure: make freetype a configurable option

Allows disabling freetype support at configure time.

Upstream-Status: Pending

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>