Parse custom metadata attached with an instruction.

llvm-svn: 83033
diff --git a/llvm/lib/AsmParser/LLLexer.cpp b/llvm/lib/AsmParser/LLLexer.cpp
index 315048c..16e0bd7 100644
--- a/llvm/lib/AsmParser/LLLexer.cpp
+++ b/llvm/lib/AsmParser/LLLexer.cpp
@@ -434,7 +434,7 @@
       ++CurPtr;
 
     StrVal.assign(TokStart+1, CurPtr);   // Skip !
-    return lltok::NamedMD;
+    return lltok::NamedOrCustomMD;
   }
   return lltok::Metadata;
 }
@@ -530,7 +530,6 @@
   KEYWORD(asm);
   KEYWORD(sideeffect);
   KEYWORD(gc);
-  KEYWORD(dbg);
 
   KEYWORD(ccc);
   KEYWORD(fastcc);