Add .loc methods to the streamer.

Next: Add support for the !HasDotLocAndDotFile case to the MCAsmStreamer
and then switch codegen to use it.

llvm-svn: 119384
diff --git a/llvm/lib/MC/MCContext.cpp b/llvm/lib/MC/MCContext.cpp
index 87619d5..053639c 100644
--- a/llvm/lib/MC/MCContext.cpp
+++ b/llvm/lib/MC/MCContext.cpp
@@ -25,7 +25,7 @@
 
 
 MCContext::MCContext(const MCAsmInfo &mai) : MAI(mai), NextUniqueID(0),
-                     CurrentDwarfLoc(0,0,0,0,0,0) {
+                     CurrentDwarfLoc(0,0,0,DWARF2_FLAG_IS_STMT,0,0) {
   MachOUniquingMap = 0;
   ELFUniquingMap = 0;
   COFFUniquingMap = 0;