Cleaned up Atom attribues some more.  Added lots of doxygen comments

llvm-svn: 147105
diff --git a/lld/lib/Core/File.cpp b/lld/lib/Core/File.cpp
index e123d5e..09c3f8a 100644
--- a/lld/lib/Core/File.cpp
+++ b/lld/lib/Core/File.cpp
@@ -13,4 +13,9 @@
 
 File::~File() {}
 
+bool File::translationUnitSource(llvm::StringRef &path) const {
+  return false;
+}
+
+
 }