Add a stub frontend action for BoostCon, for next week's workshop.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@103258 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/driver/cc1_main.cpp b/tools/driver/cc1_main.cpp
index 144a734..67dc7c6 100644
--- a/tools/driver/cc1_main.cpp
+++ b/tools/driver/cc1_main.cpp
@@ -63,6 +63,7 @@
   case ASTPrint:               return new ASTPrintAction();
   case ASTPrintXML:            return new ASTPrintXMLAction();
   case ASTView:                return new ASTViewAction();
+  case BoostCon:               return new BoostConAction();
   case DumpRawTokens:          return new DumpRawTokensAction();
   case DumpTokens:             return new DumpTokensAction();
   case EmitAssembly:           return new EmitAssemblyAction();