package/postgresql: fix build with NLS

Fixes:
 - http://autobuild.buildroot.org/results/0d35378b8bdcfffb0cefd264c95ca3617034559b

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

package/postgresql/postgresql.mk

@@ -14,8 +14,10 @@ POSTGRESQL_CONFIG_SCRIPTS = pg_config
 POSTGRESQL_CONF_ENV = \
 	ac_cv_type_struct_sockaddr_in6=yes \
 	pgac_cv_snprintf_long_long_int_modifier="ll" \
-	pgac_cv_snprintf_size_t_support=yes
+	pgac_cv_snprintf_size_t_support=yes \
+	LIBS=$(TARGET_NLS_LIBS)
 POSTGRESQL_CONF_OPTS = --disable-rpath
+POSTGRESQL_DEPENDENCIES = $(TARGET_NLS_DEPENDENCIES)
 
 # https://www.postgresql.org/docs/11/static/install-procedure.html:
 # "If you want to invoke the build from another makefile rather than