Correct AddDefaultCIncludePaths for OpenBSD to not include /usr/local/include
in the default search path. Compilers on *BSD OS's only include /usr/include by
default.

Contributed by Brad Smith <brad@comstyle.com>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161173 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/InitHeaderSearch.cpp b/lib/Frontend/InitHeaderSearch.cpp
index e5a8ca4..628487e 100644
--- a/lib/Frontend/InitHeaderSearch.cpp
+++ b/lib/Frontend/InitHeaderSearch.cpp
@@ -217,6 +217,7 @@
     switch (os) {
     case llvm::Triple::FreeBSD:
     case llvm::Triple::NetBSD:
+    case llvm::Triple::OpenBSD:
       break;
     default:
       // FIXME: temporary hack: hard-coded paths.