Add missing file to CMake list

llvm-svn: 174465
diff --git a/llvm/lib/DebugInfo/CMakeLists.txt b/llvm/lib/DebugInfo/CMakeLists.txt
index 1e9e509..e97455a 100644
--- a/llvm/lib/DebugInfo/CMakeLists.txt
+++ b/llvm/lib/DebugInfo/CMakeLists.txt
@@ -6,6 +6,7 @@
   DWARFDebugAbbrev.cpp
   DWARFDebugArangeSet.cpp
   DWARFDebugAranges.cpp
+  DWARFDebugFrame.cpp
   DWARFDebugInfoEntry.cpp
   DWARFDebugLine.cpp
   DWARFDebugRangeList.cpp