Docs: give binutils/gold instructions for CMake too.

Patch by Steve King.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221227 91177308-0d34-0410-b5e6-96231b3b80d8
R600/LLVMBuild.txt: Add TransformUtils.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221228 91177308-0d34-0410-b5e6-96231b3b80d8