tlbBuilder/CMakeLists: give some love for llvm-config related lines

allows more easily to interface the content of the variables from the
commandline

Signed-off-by: Martin Zenzes <martin.zenzes@dfki.de>
tlbBuilder/CMakeLists: bug in "resolve_library_flags"?

resolve_library_flags" is not so nice, it writes to the CACHE, possibly
aliasing cached and volatile variables...

Signed-off-by: Martin Zenzes <martin.zenzes@dfki.de>"