Move lib/LibDriver -> lib/ToolDrivers/llvm-lib. NFCI.

This reorganisation prevents us from cluttering up the top-level lib directory
with more driver libraries such as llvm-dlltool (see D29892).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302995 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed