- Improve build of the shared and static ndbclient libraries
  - Add test program which builds against the shared and static libraries
    to check that they contain all expected symbols
  - Turn off cmakes transitive linking behaviour for ndbclient so that
    the test build only uses ndbclient and not the libraries it consist of
  - Rename the main source file for the shared ndbclient library to
    ndbclient_exports.cpp insteadof dummy.cpp
  - Change the main source file for shared ndbclient to reference other
    symbols using dummy function calls instead of function pointer list
    since the latter havebeen seen to be less portable
  - Don't yet change how the shared library is buil on Windows since there
    are remaining problems in that area.
  - Cleanup how ndbjtie is included in the shared ndbclient library(for example
    only build ndbjtie once)