make getObjFileLowering() return a non-const reference.

llvm-svn: 77984
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index c2a89b2..2bef401 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -74,7 +74,7 @@
   delete &OutContext;
 }
 
-const TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
+TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
   return TM.getTargetLowering()->getObjFileLowering();
 }