Fix launcher wrapper scripts to use both lib/ and lib/sirikata/.
Fix launcher wrapper scripts to use both lib/ and lib/sirikata/.

Because json-spirit is installed in a standard location (relative to
the base CMAKE_INSTALL_PREFIX) and we use a dynamic library on some
platforms, we need to make the wrapper scripts set (DY)LD_LIBRARY_PATH
to use both the lib/sirikata/ directory, which was there before, as
well as the lib/ directory, where json-spirit is installed.

sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata