adwaita-icon-theme: depends on host-libgtk3

The adwaita icon theme can only be selected with libgtk3 and depends on
host-libgtk3 to build.

Fixes http://autobuild.buildroot.org/results/f8d/f8d0e2198fa54f9141512e2db6dc46e3cee1cd44/

Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/adwaita-icon-theme/Config.in

@@ -1,4 +1,5 @@
 config BR2_PACKAGE_ADWAITA_ICON_THEME
 	bool "adwaita icon theme"
+	depends on BR2_PACKAGE_LIBGTK3
 	help
 	  Adwaita icon theme

package/adwaita-icon-theme/adwaita-icon-theme.mk

@@ -10,6 +10,6 @@ ADWAITA_ICON_THEME_SITE = ftp://ftp.gnome.org/pub/gnome/sources/adwaita-icon-the
 ADWAITA_ICON_THEME_SOURCE = adwaita-icon-theme-$(ADWAITA_ICON_THEME_VERSION).tar.xz
 ADWAITA_ICON_THEME_LICENSE = LGPLv3 or CC-BY-SA-3.0
 ADWAITA_ICON_THEME_LICENSE_FILES = COPYING COPYING_LGPL COPYING_CCBYSA3
-ADWAITA_ICON_THEME_DEPENDENCIES = host-intltool
+ADWAITA_ICON_THEME_DEPENDENCIES = host-intltool host-libgtk3
 
 $(eval $(autotools-package))