In recent glibc versions rpc functionality has been moved to a separate
library instead of glibc itself.
Depend on this library when rpc functionality is needed and glibc is
used.
Signed-off-by: Matthias Franck <matthias.franck@softathome.com>
Link: https://github.com/openwrt/openwrt/pull/17796
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
(cherry picked from commit 84e0900867)