gst-plugins-good: add option to build cairo plugin

Fixes build issue when cairo is built without png support.

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

package/multimedia/gst-plugins-good/Config.in

@@ -168,6 +168,11 @@ config BR2_PACKAGE_GST_PLUGINS_GOOD_PLUGIN_ANNODEX
 	bool "annodex (XML Library)"
 	select BR2_PACKAGE_LIBXML2
 
+config BR2_PACKAGE_GST_PLUGINS_GOOD_PLUGIN_CAIRO
+	bool "cairo"
+	select BR2_PACKAGE_CAIRO
+	select BR2_PACKAGE_CAIRO_PNG
+
 config BR2_PACKAGE_GST_PLUGINS_GOOD_PLUGIN_FLAC
 	bool "flac (libFLAC)"
 	select BR2_PACKAGE_FLAC

package/multimedia/gst-plugins-good/gst-plugins-good.mk

@@ -302,6 +302,13 @@ else
 GST_PLUGINS_GOOD_CONF_OPT += --disable-annodex
 endif
 
+ifeq ($(BR2_PACKAGE_GST_PLUGINS_GOOD_PLUGIN_CAIRO),y)
+GST_PLUGINS_GOOD_CONF_OPT += --enable-cairo
+GST_PLUGINS_GOOD_DEPENDENCIES += cairo
+else
+GST_PLUGINS_GOOD_CONF_OPT += --disable-cairo
+endif
+
 ifeq ($(BR2_PACKAGE_GST_PLUGINS_GOOD_PLUGIN_FLAC),y)
 GST_PLUGINS_GOOD_CONF_OPT += --enable-flac
 GST_PLUGINS_GOOD_DEPENDENCIES += flac