Driver and option support for -gsplit-dwarf. This is a part of
the DWARF5 split dwarf proposal.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174349 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/WindowsToolChain.cpp b/lib/Driver/WindowsToolChain.cpp
index 454d2c1..323765a 100644
--- a/lib/Driver/WindowsToolChain.cpp
+++ b/lib/Driver/WindowsToolChain.cpp
@@ -54,6 +54,7 @@
     case Action::LipoJobClass:
     case Action::DsymutilJobClass:
     case Action::VerifyJobClass:
+    case Action::SplitDebugJobClass:
       llvm_unreachable("Invalid tool kind.");
     case Action::PreprocessJobClass:
     case Action::PrecompileJobClass: