package/libgtk2: fix build with NLS

Fixes:
 - http://autobuild.buildroot.org/results/20644475a745c04fec4a87c639bd13e4f333805a

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libgtk2/libgtk2.mk

@@ -21,7 +21,10 @@ LIBGTK2_CONF_ENV = \
 
 LIBGTK2_CONF_OPTS = --disable-glibtest --enable-explicit-deps=no
 
-LIBGTK2_DEPENDENCIES = host-pkgconf host-libgtk2 libglib2 cairo pango atk gdk-pixbuf
+LIBGTK2_DEPENDENCIES = host-pkgconf host-libgtk2 libglib2 cairo pango atk \
+	gdk-pixbuf $(TARGET_NLS_DEPENDENCIES)
+
+LIBGTK2_MAKE_OPTS = LIBS=$(TARGET_NLS_LIBS)
 
 # Xorg dependencies
 LIBGTK2_CONF_OPTS += \