bmon: add optional alsa support

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/bmon/bmon.mk

@@ -14,6 +14,12 @@ else
 BMON_CONF_OPT += --disable-curses
 endif
 
+ifeq ($(BR2_PACKAGE_ALSA_LIB),y)
+BMON_DEPENDENCIES += alsa-lib
+else
+BMON_CONF_OPT += --disable-asound
+endif
+
 ifneq ($(BR2_PREFER_STATIC_LIB),y)
 # link dynamically unless explicitly requested otherwise
 BMON_CONF_OPT += --disable-static