Apply libtools versioning to OpenSRF c-apps as well

Apply libtools versioning to OpenSRF c-apps as well

We apply a -version-info argument of 2:0:2, meaning:
  * interface = 2: interface '2' of this library
  * revision = 0: first implementation of interface '2'
  * age = 2: this library can be linked with executables going back
    two interface versions

See http://sourceware.org/autobook/autobook/autobook_91.html for more
information on the -version-info argument.

git-svn-id: svn://svn.open-ils.org/OpenSRF/branches/rel_2_0@2172 9efc2488-bf62-4759-914b-345cdb29e865