[cmake] copy ui5 and js as directories with cmake -E copy_directory
[cmake] copy ui5 and js as directories with cmake -E copy_directory

Unfortunately, file by file update does not work properly with
cmake, therefore just always copy directory. This reduces number of
cmake invocations during build
olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root