Move CXString creation/management routines into
their own .cpp file and make the interpretation
of its flags private.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119319 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CIndexCodeCompletion.cpp b/tools/libclang/CIndexCodeCompletion.cpp
index f22f5ee..7e8cdb2 100644
--- a/tools/libclang/CIndexCodeCompletion.cpp
+++ b/tools/libclang/CIndexCodeCompletion.cpp
@@ -13,6 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "CIndexer.h"
+#include "CXString.h"
 #include "CIndexDiagnostic.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/FileManager.h"