meson: convert audio directory to Meson

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/configure b/configure
index 68cf306..cd6ad9c 100755
--- a/configure
+++ b/configure
@@ -3767,6 +3767,8 @@
     alsa | try-alsa)
     if $pkg_config alsa --exists; then
         alsa_libs=$($pkg_config alsa --libs)
+        alsa_cflags=$($pkg_config alsa --cflags)
+        alsa=yes
         if test "$drv" = "try-alsa"; then
             audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-alsa/alsa/')
         fi
@@ -3782,7 +3784,9 @@
 
     pa | try-pa)
     if $pkg_config libpulse --exists; then
+        libpulse=yes
         pulse_libs=$($pkg_config libpulse --libs)
+        pulse_cflags=$($pkg_config libpulse --cflags)
         if test "$drv" = "try-pa"; then
             audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-pa/pa/')
         fi
@@ -3825,6 +3829,7 @@
 
     jack | try-jack)
     if $pkg_config jack --exists; then
+        libjack=yes
         jack_libs=$($pkg_config jack --libs)
         if test "$drv" = "try-jack"; then
             audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-jack/jack/')
@@ -7036,11 +7041,22 @@
 	    echo "$def=y" >> $config_host_mak ;;
     esac
 done
+if test "$alsa" = "yes" ; then
+    echo "CONFIG_ALSA=y" >> $config_host_mak
+fi
 echo "ALSA_LIBS=$alsa_libs" >> $config_host_mak
+echo "ALSA_CFLAGS=$alsa_cflags" >> $config_host_mak
+if test "$libpulse" = "yes" ; then
+    echo "CONFIG_LIBPULSE=y" >> $config_host_mak
+fi
 echo "PULSE_LIBS=$pulse_libs" >> $config_host_mak
+echo "PULSE_CFLAGS=$pulse_cflags" >> $config_host_mak
 echo "COREAUDIO_LIBS=$coreaudio_libs" >> $config_host_mak
 echo "DSOUND_LIBS=$dsound_libs" >> $config_host_mak
 echo "OSS_LIBS=$oss_libs" >> $config_host_mak
+if test "$libjack" = "yes" ; then
+    echo "CONFIG_LIBJACK=y" >> $config_host_mak
+fi
 echo "JACK_LIBS=$jack_libs" >> $config_host_mak
 if test "$audio_win_int" = "yes" ; then
   echo "CONFIG_AUDIO_WIN_INT=y" >> $config_host_mak