ClangRefactoring: Map unsaved files with non-native paths in ClangTool

Otherwise the ClangTool complains that it does not see them.

Change-Id: Ib616058584f8f95229213224cec98fa6b6f7522b
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/tools/clangrefactoringbackend/source/clangtool.h

@@ -55,12 +55,12 @@ struct FileContent
 
 struct UnsavedFileContent
 {
-    UnsavedFileContent(NativeFilePath &&filePath, Utils::SmallString &&content)
+    UnsavedFileContent(FilePath &&filePath, Utils::SmallString &&content)
         : filePath(std::move(filePath))
         , content(std::move(content))
     {}
 
-    NativeFilePath filePath;
+    FilePath filePath;
     Utils::SmallString content;
 };