Build a libtool-ized library for serf.
Build a libtool-ized library for serf.

* Makefile.in: Move SERF_*_VERSION to top; define TARGET_LIB; add prefix foo;
  switch targets to use library rather than objects directly; build test
  programs statically (so that they can run from test dir); clean library too


git-svn-id: 683495cb1553624b05a54e2ba9533425f69cf277@690 61a7d7f5-40b7-0310-9c16-bb0ea8cb1845

coapp-packages/serf,coapp-packages/serf,coapp-packages/serf