Driver: Add a toolchain hook for whether the system has native LLVM support.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@114137 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChain.cpp b/lib/Driver/ToolChain.cpp
index 337ea4e..e9a612c 100644
--- a/lib/Driver/ToolChain.cpp
+++ b/lib/Driver/ToolChain.cpp
@@ -43,6 +43,10 @@
   return types::lookupTypeForExtension(Ext);
 }
 
+bool ToolChain::HasNativeLLVMSupport() const {
+  return false;
+}
+
 /// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targetting.
 //
 // FIXME: tblgen this.