add trivial support for passing label definitions through the MCStreamer.

This is suboptimal in several aspects, see the commented out assertion.
I need to talk to Daniel about this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74057 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-mc/AsmParser.h b/tools/llvm-mc/AsmParser.h
index 9a2c6da..9515448 100644
--- a/tools/llvm-mc/AsmParser.h
+++ b/tools/llvm-mc/AsmParser.h
@@ -17,17 +17,20 @@
 #include "AsmLexer.h"
 
 namespace llvm {
+class MCContext;
 class MCInst;
 class MCStreamer;
   
 class AsmParser {
   AsmLexer Lexer;
+  MCContext &Ctx;
   MCStreamer &Out;
   
   struct X86Operand;
   
 public:
-  AsmParser(SourceMgr &SM, MCStreamer &OutStr) : Lexer(SM), Out(OutStr) {}
+  AsmParser(SourceMgr &SM, MCContext &ctx, MCStreamer &OutStr)
+    : Lexer(SM), Ctx(ctx), Out(OutStr) {}
   ~AsmParser() {}
   
   bool Run();