Clang tools need their builtin headers and search for them the same way Clang
does. Thus, the default location to look for builtin headers is in a path
-``$(dirname /path/to/tool)/../lib/clang/3.2/include`` relative to the tool
+``$(dirname /path/to/tool)/../lib/clang/3.3/include`` relative to the tool
binary. This works out-of-the-box for tools running from llvm's toplevel
binary directory after building clang-headers, or if the tool is running from
the binary directory of a clang install next to the clang binary.