package/popt: fix libiconv dependency

Make sure that libiconv is built before popt when needed.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/popt/popt.mk

@@ -21,6 +21,7 @@ POPT_CONF_ENV = ac_cv_va_copy=yes
 ifeq ($(BR2_PACKAGE_LIBICONV),y)
 POPT_CONF_ENV += am_cv_lib_iconv=yes
 POPT_CONF_OPTS += --with-libiconv-prefix=$(STAGING_DIR)/usr
+POPT_DEPENDENCIES += libiconv
 endif
 
 $(eval $(autotools-package))