Teach the include sorter to quickly skip files with an extension that
doesn't look like it will have C++ code in it.

Suggestions on a better heuristic are welcome.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169248 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed