Add new tools/libcling/CMakeLists.txt.
Add new tools/libcling/CMakeLists.txt.

root-mirror/cling,karies/cling,root-mirror/cling,root-mirror/cling,root-mirror/cling,karies/cling,marsupial/cling,marsupial/cling,karies/cling,karies/cling,karies/cling,root-mirror/cling,marsupial/cling,root-mirror/cling,marsupial/cling,karies/cling,marsupial/cling,marsupial/cling