Summary:
This patch adds Windows support for a few of the llvm-config commands,
including cflags, ldflags, libs, and system-libs.
Currently llvm-config is untested, so this patch adds tests for the
commands that it fixes as well.
Reviewers: rnk
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D16762
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260263 91177308-0d34-0410-b5e6-96231b3b80d8