Remove out-of-date comment in llvm/tools/CMakeLists.txt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202857 91177308-0d34-0410-b5e6-96231b3b80d8
[CMake] check-llvm: Include "bugpoint" in dependent list.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202858 91177308-0d34-0410-b5e6-96231b3b80d8