package/bind: fix compile/linking failure

package/bind: fix compile/linking failure

Fixes:

  - http://autobuild.buildroot.net/results/966a3de94aa97fa8e9895eede29c9cbfb4bd7301

  .../host/lib/gcc/arm-buildroot-linux-musleabihf/9.3.0/../../../../arm-buildroot-linux-musleabihf/bin/ld: warning: libisccfg.so.163, needed by ../../lib/bind9/.libs/libbind9.so, not found (try using -rpath or -rpath-link)
  .../host/lib/gcc/arm-buildroot-linux-musleabihf/9.3.0/../../../../arm-buildroot-linux-musleabihf/bin/ld: ../../lib/bind9/.libs/libbind9.so: undefined reference to `cfg_obj_line'

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
[Peter: replace by upstream patches]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>