python-alsaaudio: needs pcm and mixer support in alsa

Fixes:
http://autobuild.buildroot.net/results/20a/20ac027a2b27457dd046f83abc329cf9caaaca8a/
http://autobuild.buildroot.net/results/3b8/3b882e1196dfea18e55670f397732998c781b280/
http://autobuild.buildroot.net/results/2de/2dec463de766272ff29bbef8fd08a223d16a92a0/

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-alsaaudio/Config.in

@@ -5,6 +5,8 @@ config BR2_PACKAGE_PYTHON_ALSAAUDIO
 	bool "python-alsaaudio"
 	depends on BR2_TOOLCHAIN_HAS_THREADS # alsa-lib
 	select BR2_PACKAGE_ALSA_LIB
+	select BR2_PACKAGE_ALSA_LIB_PCM
+	select BR2_PACKAGE_ALSA_LIB_MIXER
 	help
 	  The PyAlsaAudio package contains bindings for the ALSA sound
 	  API.