Initial support for the cfi directives. This is just enough to get

f:
        .cfi_startproc
        nop
        .cfi_endproc

assembled (on ELF).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121434 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/lto/LTOModule.cpp b/tools/lto/LTOModule.cpp
index 2453e2b..a33b8b4 100644
--- a/tools/lto/LTOModule.cpp
+++ b/tools/lto/LTOModule.cpp
@@ -428,7 +428,7 @@
   _symbolsParsed = true;
 
   // Use mangler to add GlobalPrefix to names to match linker names.
-  MCContext Context(*_target->getMCAsmInfo());
+  MCContext Context(*_target->getMCAsmInfo(), NULL);
   Mangler mangler(Context, *_target->getTargetData());
 
   // add functions