package/sconeserver: fix static link with openssl

When linking statically, the order of libraries on the linker command
line is important, and sconeserver got it wrong.

Also, sconeserver does not use pkg-config, so it misses the private
libs of -lcrypto, which is linking with -lz.

Fix that:
  - add a patch to configure.in to fix the order of libraries;
  - forcibly pass -lz when linking statically with openssl.

Note: we were already reconfiguring sconeserver, because it comes from
the github repository.

Fixes:
    http://autobuild.buildroot.org/results/403/403eac974ecdaacdb66b8241fbdcf19ec5e07480



Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>