postgresql: fix pgac_cv_snprintf_long_long_int_modifier

Supplementary change the pgac_cv_snprintf_long_long_int_modifier from
complete format '%lld' to modifier 'll' version only (forgotten in commit
02c43157ab09f6fe4078fd1145fc9d403d66c089 ([1])).

Fixes Bug 9451 ([2]).

[1] https://git.buildroot.net/buildroot/commit/?id=02c43157ab09f6fe4078fd1145fc9d403d66c089
[2] https://bugs.busybox.net/show_bug.cgi?id=9451

Reported-by: Daniel <dde@innovaphone.com>
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/postgresql/postgresql.mk

@@ -13,7 +13,7 @@ POSTGRESQL_INSTALL_STAGING = YES
 POSTGRESQL_CONFIG_SCRIPTS = pg_config
 POSTGRESQL_CONF_ENV = \
 	ac_cv_type_struct_sockaddr_in6=yes \
-	pgac_cv_snprintf_long_long_int_modifier="%lld" \
+	pgac_cv_snprintf_long_long_int_modifier="ll" \
 	pgac_cv_snprintf_size_t_support=yes
 POSTGRESQL_CONF_OPTS = --disable-rpath