Rewrite/FrontendActions.cpp: Tweak to unbreak msvc.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149041 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Rewrite/FrontendActions.cpp b/lib/Rewrite/FrontendActions.cpp
index 66affb0..b726d76 100644
--- a/lib/Rewrite/FrontendActions.cpp
+++ b/lib/Rewrite/FrontendActions.cpp
@@ -23,7 +23,13 @@
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/FileSystem.h"
+
+// FIXME: This is terrible, we need this for ::close.
+#if !defined(_MSC_VER)
 #include <unistd.h>
+#else
+#include <io.h>
+#endif
 
 using namespace clang;