libclang: itroduce cxstring::createEmpty()


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174174 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CXString.cpp b/tools/libclang/CXString.cpp
index 030e34c..f2f33a2 100644
--- a/tools/libclang/CXString.cpp
+++ b/tools/libclang/CXString.cpp
@@ -29,6 +29,13 @@
 // Basic generation of CXStrings.
 //===----------------------------------------------------------------------===//
 
+CXString cxstring::createEmpty() {
+  CXString Str;
+  Str.data = "";
+  Str.private_flags = CXS_Unmanaged;
+  return Str;
+}
+
 CXString cxstring::createNull() {
   CXString Str;
   Str.data = 0;