package/poppler: use ENABLE_GLIB

Use ENABLE_GLIB which is available since version 0.60 and
https://github.com/freedesktop/poppler/commit/766a32ff59dadd9ae4639d8a79861a17be6aec52

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/poppler/poppler.mk

@@ -98,6 +98,9 @@ endif
 
 ifeq ($(BR2_PACKAGE_LIBGLIB2),y)
 POPPLER_DEPENDENCIES += libglib2
+POPPLER_CONF_OPTS += -DENABLE_GLIB=ON
+else
+POPPLER_CONF_OPTS += -DENABLE_GLIB=OFF
 endif
 
 ifeq ($(BR2_PACKAGE_LIBNSS),y)