Fix for case-sensitive file systems. Ugh

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173303 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/GlobalModuleIndex.cpp b/lib/Serialization/GlobalModuleIndex.cpp
index 630646f..3b60979 100644
--- a/lib/Serialization/GlobalModuleIndex.cpp
+++ b/lib/Serialization/GlobalModuleIndex.cpp
@@ -22,7 +22,7 @@
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/Bitcode/BitstreamReader.h"
 #include "llvm/Bitcode/BitstreamWriter.h"
-#include "llvm/Support/Filesystem.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/LockFileManager.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PathV2.h"