build/CMake: Remove llvm-config.target used to serialize tool builds on
llvm-config build, there is no longer a point to this after Chandler's work.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143540 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed