Make llvm-symbolizer work on Windows.

Differential Revision: http://reviews.llvm.org/D9234
Reviewed By: Alexey Samsonov

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235900 91177308-0d34-0410-b5e6-96231b3b80d8
12 files changed