First cut at the Makefile for llvm-config. This initial version just provides

First cut at the Makefile for llvm-config. This initial version just provides
the rule for building the LibDeps.txt file using GenLibDeps.pl. This needs
to be done from time to time manually in order to keep LibDeps.txt up to
date.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26875 91177308-0d34-0410-b5e6-96231b3b80d8