add new JumpTableSpecialLabelPrefix hook to asmprinter for jumptable emission.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33314 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetAsmInfo.cpp b/lib/Target/TargetAsmInfo.cpp
index 3afbddb..45ea0ee 100644
--- a/lib/Target/TargetAsmInfo.cpp
+++ b/lib/Target/TargetAsmInfo.cpp
@@ -28,6 +28,7 @@
   CommentString("#"),
   GlobalPrefix(""),
   PrivateGlobalPrefix("."),
+  JumpTableSpecialLabelPrefix(0),
   GlobalVarAddrPrefix(""),
   GlobalVarAddrSuffix(""),
   FunctionAddrPrefix(""),