Frontend: Add basic -H support.
 - I didn't implement the GCC "multiple include guard" detection parts, because
   it doesn't seem useful or obvious.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111983 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 4f839e9..9e7a061 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -962,6 +962,7 @@
   }
 
   Args.AddAllArgs(CmdArgs, options::OPT_v);
+  Args.AddLastArg(CmdArgs, options::OPT_H);
   Args.AddLastArg(CmdArgs, options::OPT_P);
   Args.AddLastArg(CmdArgs, options::OPT_print_ivar_layout);