tree 4206a82d330cf062649fd2fccd85414327d14131
parent b5f2c419842d016892b9c976d4d6e91880e0e43a
author Jeffrey Yasskin <jyasskin@google.com> 1329841212 +0000
committer Jeffrey Yasskin <jyasskin@google.com> 1329841212 +0000

Allow linux builds to take advantage of libunwind to get unwind.h if
that's installed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151058 91177308-0d34-0410-b5e6-96231b3b80d8