Correct the vim: specification

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16087 91177308-0d34-0410-b5e6-96231b3b80d8

lib/System/Path.cpp

@@ -36,4 +36,4 @@ Path::is_directory() const {
 // Include the truly platform-specific parts of this class.
 #include "platform/Path.cpp"
 
-// vim: sw=2
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab